diff --git a/.editorconfig b/.editorconfig
index 5b0a40b74..4ea5e2ea9 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -135,8 +135,8 @@ indent_size = 4
 indent_style = space
 indent_size = 4
 
-# Racket
-[*.rkt]
+# Racket/Scheme
+[*.{rkt,ss,scm}]
 indent_style = space
 indent_size = 2
 
diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 8baea2e3d..6f8f1e264 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -53,3 +53,5 @@ This file lists everyone, who contributed to this repo and wanted to show up her
 - James Goytia
 - Amaras
 - Jonathan Dönszelmann
+- Ishaan Verma
+- Delphi1024
diff --git a/README.md b/README.md
index 2e3c5223b..e8d947857 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,12 @@
 The Arcane Algorithm Archive is a collaborative effort to create a guide for all important algorithms in all languages.
 This goal is obviously too ambitious for a book of any size, but it is a great project to learn from and work on and will hopefully become an incredible resource for programmers in the future.
 
+To change the language, please use the UI at the top of the site:
+
+<p>
+  <img  class="center" src="res/languages.gif" style="width:50%" />
+</p>
+
 Here are some essential links:
 
 - Book / website: <https://www.algorithm-archive.org/>
diff --git a/contents/bogo_sort/bogo_sort.md b/contents/bogo_sort/bogo_sort.md
index cc8e9ce2a..5f493e0e1 100644
--- a/contents/bogo_sort/bogo_sort.md
+++ b/contents/bogo_sort/bogo_sort.md
@@ -69,6 +69,8 @@ In code, it looks something like this:
 [import:12-16, lang:"scala"](code/scala/bogo.scala)
 {% sample lang="go" %}
 [import:27-31, lang:"go"](code/go/bogo_sort.go)
+{% sample lang="coco" %}
+[import:6-8, lang:"coconut"](code/coconut/bogo.coco)
 {% endmethod %}
 
 That's it.
@@ -137,6 +139,8 @@ We are done here!
 [import, lang:"scala"](code/scala/bogo.scala)
 {% sample lang="go" %}
 [import, lang:"go"](code/go/bogo_sort.go)
+{% sample lang="coco" %}
+[import, lang:"coconut"](code/coconut/bogo.coco)
 {% endmethod %}
 
 
diff --git a/contents/bogo_sort/code/coconut/bogo.coco b/contents/bogo_sort/code/coconut/bogo.coco
new file mode 100644
index 000000000..bc467bafb
--- /dev/null
+++ b/contents/bogo_sort/code/coconut/bogo.coco
@@ -0,0 +1,15 @@
+import random
+
+
+is_sorted = l -> (l, l[1:]) |*> zip |> map$(t -> t[0] <= t[1]) |> all
+
+def bogo_sort(a):
+    while not is_sorted(a):
+        random.shuffle(a)
+
+
+if __name__ == '__main__':
+    a = [1, 3, 2, 4]
+    print('Unsorted:', a)
+    bogo_sort(a)
+    print('Sorted:', a)
diff --git a/contents/bogo_sort/code/nim/bogo_sort.nim b/contents/bogo_sort/code/nim/bogo_sort.nim
index aca98f749..9f4838a6c 100644
--- a/contents/bogo_sort/code/nim/bogo_sort.nim
+++ b/contents/bogo_sort/code/nim/bogo_sort.nim
@@ -3,24 +3,23 @@ import random
 randomize()
 
 proc print_array(a: openArray[int]) =
-    for n in 0 .. len(a)-1:
-        echo a[n]
+  for n in 0 .. len(a)-1:
+    echo a[n]
 
-proc is_sorted(a: openArray[int]): bool =
-    for n in 1 .. len(a)-1:
-        if a[n] > a[n-1]:
-            return false
-    
-    return true
+func is_sorted(a: openArray[int]): bool =
+  result = true
+  for n in 1 .. len(a)-1:
+    if a[n] > a[n-1]:
+      result = false
+      break
 
 proc bogo_sort(a: var openArray[int]) =
-    while not is_sorted(a):
-        shuffle(a)
-        
+  while not is_sorted(a):
+    shuffle(a)
 
-var x: array[10,int] =  [32,32,64,16,128,8,256,4,512,2]
-
-print_array(x)
-bogo_sort(x)
-echo "\n"
-print_array(x)
+when isMainModule:
+  var x = [32, 32, 64, 16, 128, 8, 256, 4, 512, 2]
+  print_array(x)
+  bogo_sort(x)
+  echo "\n"
+  print_array(x)
diff --git a/contents/bubble_sort/bubble_sort.md b/contents/bubble_sort/bubble_sort.md
index 8b5b6b8e8..27071de4a 100644
--- a/contents/bubble_sort/bubble_sort.md
+++ b/contents/bubble_sort/bubble_sort.md
@@ -78,6 +78,8 @@ This means that we need to go through the vector $$\mathcal{O}(n^2)$$ times with
 [import:1-6, lang:"coffeescript"](code/coffeescript/bubblesort.coffee)
 {% sample lang="r" %}
 [import:1-12, lang:"r"](code/r/bubble_sort.R)
+{% sample lang="coco" %}
+[import:3-10, lang:"coconut"](code/coconut/bubblesort.coco)
 {% endmethod %}
 
 ... And that's it for the simplest bubble sort method.
@@ -159,6 +161,8 @@ The code snippet was taken from this [Scratch project](https://scratch.mit.edu/p
 [import, lang:"coffeescript"](code/coffeescript/bubblesort.coffee)
 {% sample lang="r" %}
 [import, lang:"r"](code/r/bubble_sort.R)
+{% sample lang="coco" %}
+[import, lang:"coconut"](code/coconut/bubblesort.coco)
 {% endmethod %}
 
 <script>
diff --git a/contents/bubble_sort/code/coconut/bubblesort.coco b/contents/bubble_sort/code/coconut/bubblesort.coco
new file mode 100644
index 000000000..7bafe1d73
--- /dev/null
+++ b/contents/bubble_sort/code/coconut/bubblesort.coco
@@ -0,0 +1,16 @@
+import random
+
+def swap_till(x, []) = [x]
+
+addpattern def swap_till(x, y is int) = [min(x, y), max(x, y)]
+
+addpattern def swap_till(x, [y] + rest) =
+    [min(x, y)] + swap_till(max(x, y), rest)
+
+bubble_sort = reduce$((x, y) -> swap_till(y, x))
+
+if __name__ == '__main__':
+    array = range(10) |> map$(-> random.randint(0, 1000)) |> list
+    print('Before sorting:', array)
+    array = bubble_sort(array) |> list
+    print('After sorting:', array)
diff --git a/contents/computus/code/nim/gauss_easter.nim b/contents/computus/code/nim/gauss_easter.nim
new file mode 100644
index 000000000..f8d1e40de
--- /dev/null
+++ b/contents/computus/code/nim/gauss_easter.nim
@@ -0,0 +1,45 @@
+import strformat
+
+func computus(year: int, servois: bool = false): string =
+  let
+    # Year's position on the 19 year metonic cycle
+    a = year mod 19
+    # Century index
+    k = year div 100
+    # Shift of metonic cycle, add a day offset every 300 years
+    p = (13 + 8 * k) div 25
+    # Correction for non-observed leap days
+    q = k div 4
+    # Correction to starting point of calculation each century
+    m = (15 - p + k - q) mod 30
+    # Number of days from March 21st until the full moon
+    d = (19 * a + m) mod 30
+  # Returning of user wants value for Servois' table
+  if servois:
+    return $((21 + d) mod 31)
+  let
+    # Find the next Sunday
+    # Century-based offset in weekly calculation
+    n = (4 + k - q) mod 7
+    # Correction for leap days
+    b = year mod 4
+    c = year mod 7
+    # Days from d to next Sunday
+    temp_e = (2 * b + 4 * c + 6 * d + n) mod 7
+    # Historical corrections for April 26 and 25
+    e = if (d == 29 and temp_e == 6) or (d == 28 and temp_e == 6 and a > 10):
+          -1
+        else:
+          temp_e
+  # Determination of the correct month for Easter
+  if (22 + d + e) > 31:
+    result = "April {d + e - 9}".fmt
+  else:
+    result = "March {22 + d + e}".fmt
+
+when isMainModule:
+  echo "The following are the dates of the Paschal full moon (using Servois "
+  echo "notation) and the date of Easter for 2020-2030 AD:"
+  echo "Year Servois number Easter"
+  for year in 2020..2030:
+    echo "{year} {computus(year, true):14} {computus(year, false):6}".fmt
diff --git a/contents/computus/computus.md b/contents/computus/computus.md
index eadb20a75..087e9e7ae 100644
--- a/contents/computus/computus.md
+++ b/contents/computus/computus.md
@@ -297,6 +297,8 @@ For now, we have the code outputting a tuple of $$d$$ and $$e$$, so users can us
 [import, lang:"cpp"](code/c++/gauss_easter.cpp)
 {% sample lang="lisp" %}
 [import, lang:"lisp"](code/clisp/gauss-easter.lisp)
+{% sample lang="nim" %}
+[import, lang:"nim"](code/nim/gauss_easter.nim)
 {% endmethod %}
 
 
diff --git a/contents/cooley_tukey/code/clisp/fft.lisp b/contents/cooley_tukey/code/clisp/fft.lisp
new file mode 100644
index 000000000..8fa7273a1
--- /dev/null
+++ b/contents/cooley_tukey/code/clisp/fft.lisp
@@ -0,0 +1,113 @@
+
+(defun coefficient (time-index freq-index dft-len)
+  "Calculates a single twiddle factor for the Fourier Transform."
+  (exp (- (/ (* #c(0 1) 2.0 pi time-index freq-index)
+             dft-len))))
+
+(defun dft (data)
+  "Performs the Discrete Fourier Transform"
+  (let ((dft-len (length data)))
+    (loop for freq-index from 0 below dft-len collect
+      (loop for time-index from 0 below dft-len sum
+        (* (coefficient time-index freq-index dft-len) (elt data time-index))))))
+
+(defun merge-sub-ffts (evens odds)
+  "Combines the FFTs of the even and odd indices."
+  (let* ((fft-length (+ (length evens) (length odds)))
+         ;; Calculate coefficients for the odd indices.
+         (twiddle-factors (loop for i from 0 below (length odds)
+                             collect (coefficient 1.0 i fft-length)))
+         ;; Multiply values with coefficients.
+         (odd-terms (mapcar #'* odds twiddle-factors)))
+    ;; Combine the two FFTs.
+    (concatenate 'list 
+                 (mapcar #'+ evens odd-terms)
+                 (mapcar #'- evens odd-terms))))
+
+(defun cooley-tukey-rec (data)
+  "Performs the Fourier Transform using the recursive Cooley-Tukey method."
+  (if (<= (length data) 1)
+      data
+      (loop
+        for i from 0 below (length data)
+        ;; Split even and odd indexed elements into two seperate lists.
+        if (evenp i)
+          collect (elt data i) into evens
+        else
+          collect (elt data i) into odds
+        finally
+          ;; Calculate the Fourier Transform for the two smaller lists and
+          ;; combine them into the Fourier Transform of the full input.
+          (return (merge-sub-ffts (cooley-tukey-rec evens)
+                                  (cooley-tukey-rec odds))))))
+
+(defun reverse-bits (value num-bits)
+  "Reverses the bits of a value"
+  (if (= num-bits 1)
+      value
+      ;; Split bits into two parts.
+      (let* ((num-low-bits (floor (/ num-bits 2))) 
+             (num-high-bits (- num-bits num-low-bits))
+             (bit-mask (- (expt 2 num-low-bits) 1))
+             (lower-half (logand value bit-mask))
+             (upper-half (ash value (- num-low-bits))))
+        ;; Reverse the bits of each part, then swap the results.
+        (logior (ash (reverse-bits lower-half num-low-bits) num-high-bits)
+                (reverse-bits upper-half num-high-bits)))))
+
+(defun bit-shuffle-indices (data)
+  "Rearanges the elements in a list according to their bit-reversed indices."
+  (loop 
+    with num-bits = (floor (log (length data) 2)) 
+    for i from 0 below (length data)
+    collect (elt data (reverse-bits i num-bits))))
+
+(defun butterfly (a b coeff)
+  "Calculates a single butterfly."
+  (values (+ a (* coeff b)) (- a (* coeff b))))
+
+(defun butterfly-group (data start stride)
+  "Calculates a single group of butterflies."
+  (dotimes (i stride)
+    ;; Take two elements which are stride apart and perform a butterfly on them.
+    (let* ((first-elt-index (+ start i))
+           (second-elt-index (+ start i stride))
+           (first-elt (elt data first-elt-index))
+           (second-elt (elt data second-elt-index))
+           (coeff (coefficient 1.0 i (* 2 stride))))
+    (multiple-value-bind (sum difference) (butterfly first-elt second-elt coeff)
+      ;; Write results back into the list.
+      (setf (elt data first-elt-index) sum)
+      (setf (elt data second-elt-index) difference)))))
+
+(defun cooley-tukey-iter (data)
+  "Performs the Fourier Transform using the iterative Cooley-Tukey method."
+  (loop
+    ;; Bit-shuffle indices.
+    with shuffled-data = (bit-shuffle-indices data)
+    for stride = 1 then (* 2 stride)
+    while (< stride (length shuffled-data))
+    do
+      ;; Compute butterfly groups for the current stride.
+      (loop for i from 0 below (length shuffled-data) by (* 2 stride) do
+        (butterfly-group shuffled-data i stride))
+    finally (return shuffled-data)))
+
+(defun approx-eql (list1 list2)
+  (let ((diffs (mapcar #'(lambda (e1 e2) (abs (- e1 e2)))
+                       list1
+                       list2)))
+    (loop for d in diffs always (< d 1e-9))))
+
+(defun test-fft (data)
+  (let ((dft-result (dft data))
+        (rec-result (cooley-tukey-rec data))
+        (iter-result (cooley-tukey-iter data)))
+    (format T "~&DFT and recursive Cooley-Tukey approx. equal: ~a" 
+              (approx-eql dft-result rec-result))
+    (format T "~&DFT and iterative Cooley-Tukey approx. equal: ~a"
+              (approx-eql dft-result iter-result))
+    (format T "~&Recursive Cooley-Tukey and iterative Cooley-Tukey approx. equal: ~a" 
+              (approx-eql rec-result iter-result))))
+
+(test-fft '(0.0 0.25 0.5 0.75 0.0 -0.25 -0.5 -0.75))
diff --git a/contents/cooley_tukey/cooley_tukey.md b/contents/cooley_tukey/cooley_tukey.md
index de3feae49..d67d4dbd2 100644
--- a/contents/cooley_tukey/cooley_tukey.md
+++ b/contents/cooley_tukey/cooley_tukey.md
@@ -89,6 +89,8 @@ For some reason, though, putting code to this transformation really helped me fi
 [import:3-15, lang:"javascript"](code/javascript/fft.js)
 {% sample lang="rs" %}
 [import:24-37, lang:"rust"](code/rust/fft.rs)
+{% sample lang="lisp" %}
+[import:2-12, lang:"lisp"](code/clisp/fft.lisp)
 {% endmethod %}
 
 In this function, we define `n` to be a set of integers from $$0 \rightarrow N-1$$ and arrange them to be a column.
@@ -142,6 +144,8 @@ In the end, the code looks like:
 [import:17-39, lang="javascript"](code/javascript/fft.js)
 {% sample lang="rs" %}
 [import:39-55, lang:"rust"](code/rust/fft.rs)
+{% sample lang="lisp" %}
+[import:14-42, lang:"lisp"](code/clisp/fft.lisp)
 {% endmethod %}
 
 As a side note, we are enforcing that the array must be a power of 2 for the operation to work.
@@ -255,6 +259,8 @@ Some rather impressive scratch code was submitted by Jie and can be found here:
 [import, lang:"javascript"](code/javascript/fft.js)
 {% sample lang="rs" %}
 [import, lang:"rust"](code/rust/fft.rs)
+{% sample lang="lisp" %}
+[import, lang:"lisp"](code/clisp/fft.lisp)
 {% endmethod %}
 
 <script>
diff --git a/contents/domain_coloring/code/python/domain_coloring.py b/contents/domain_coloring/code/python/domain_coloring.py
new file mode 100644
index 000000000..cb8be03f5
--- /dev/null
+++ b/contents/domain_coloring/code/python/domain_coloring.py
@@ -0,0 +1,83 @@
+
+import numpy as np
+import matplotlib.pyplot as plt
+import matplotlib.colors
+from matplotlib.cm import ScalarMappable
+
+
+def f(z):
+    return z**2
+
+
+def magnitude_shading(f_val):
+    f_val_abs = np.abs(f_val)
+    return 0.5 + 0.5 * (f_val_abs - np.floor(f_val_abs))
+
+
+def gridlines(f_val, threshold):
+    return (np.abs(np.sin(np.pi * np.real(f_val))) ** threshold
+            * np.abs(np.sin(np.pi * np.imag(f_val))) ** threshold)
+
+
+def color(f_val, threshold):
+    hue = (np.pi - np.angle(f_val)) / (2.0 * np.pi)
+    saturation = magnitude_shading(f_val)
+    value = gridlines(f_val, threshold)
+
+    # Currently we have a tuple of 2D-arrays (hue, saturation, value).
+    # This makes it a 2D-array of tuples, which the conversion function requires.
+    hsv = np.moveaxis((hue, saturation, value), 0, -1)
+    return matplotlib.colors.hsv_to_rgb(hsv)
+
+
+if __name__ == "__main__":
+    # Create a new figure containing a single plot
+    fig, axes = plt.subplots(1, 1)
+
+    # Set the title for the plot
+    axes.set_title("$f(x)=z^2$")
+
+    # Create color bar
+    cbar = fig.colorbar(
+        ScalarMappable(matplotlib.colors.Normalize(0.0, 2.0 * np.pi), "hsv"),
+        ax=axes,
+        label="Phase Angle")
+
+    # Set x and y labels
+    axes.set_xlabel("$Re(z)$")
+    axes.set_ylabel("$Im(z)$")
+    
+    # Set color bar tick locations and labels
+    cbar.set_ticks([0.0, np.pi, 2.0 * np.pi])
+    cbar.set_ticklabels(["$0.0$", "$\pi$", "$2\pi$"])
+
+    # Hide x and y ticks
+    for tick in axes.get_xticklines():
+        tick.set_visible(False)
+
+    for tick in axes.get_yticklines():
+        tick.set_visible(False)
+
+    # Create a 500x500 input grid
+    coords = np.linspace(-2.0, 2.0, 500)
+    z_real, z_imag = np.meshgrid(coords, coords)
+    z = z_real + 1j * z_imag
+
+    # Calculate function values
+    f_val = f(z)
+
+    # Map function values to colors
+    colors = color(f_val, 0.1)
+
+    # Plot the colors
+    #   extent=(-2.0, 2.0, -2.0, 2.0) sets the x and y ranges
+    #   origin="lower" places index (0,0) of the color array in the lower-left corner
+    #   aspect="equal" ensures that the plot is square
+    axes.imshow(
+        colors,
+        extent=(-2.0, 2.0, -2.0, 2.0),
+        origin="lower",
+        aspect="equal")
+
+    # Save output
+    fig.savefig("domain.png")
diff --git a/contents/domain_coloring/domain_coloring.md b/contents/domain_coloring/domain_coloring.md
index 31facd2cf..39159e650 100644
--- a/contents/domain_coloring/domain_coloring.md
+++ b/contents/domain_coloring/domain_coloring.md
@@ -174,6 +174,8 @@ Here is the full script to generate a domain colored output of $$f(z)=z^2$$.
 {% method %}
 {% sample lang="gnuplot" %}
 [import, lang:"gnuplot"](code/gnuplot/domain_coloring.gp)
+{% sample lang="python & matplotlib" %}
+[import, lang:"python"](code/python/domain_coloring.py)
 {% endmethod %}
 
 ### Bibliography
diff --git a/contents/euclidean_algorithm/code/nim/euclid_algorithm.nim b/contents/euclidean_algorithm/code/nim/euclid_algorithm.nim
index e8da73d1a..e74855592 100644
--- a/contents/euclidean_algorithm/code/nim/euclid_algorithm.nim
+++ b/contents/euclidean_algorithm/code/nim/euclid_algorithm.nim
@@ -1,16 +1,16 @@
-proc euclid_mod(in1, in2: int): int =
+func euclid_mod(in1, in2: int): int =
   var
     a = abs(in1)
     b = abs(in2)
-    
+
   while b != 0:
     let temp: int = b
     b = a mod b
     a = temp;
 
-    return a
+  result = a
 
-proc euclid_sub(in1, in2: int): int =
+func euclid_sub(in1, in2: int): int =
   var
     a = abs(in1)
     b = abs(in2)
@@ -20,8 +20,9 @@ proc euclid_sub(in1, in2: int): int =
       a -= b
     else:
       b -= a
-    
-    return a
 
-echo euclid_sub(64 * 67, 64 * 81)
-echo euclid_mod(128 * 12, 128 * 77)
\ No newline at end of file
+  result = a
+
+when isMainModule:
+  echo euclid_sub(64 * 67, 64 * 81)
+  echo euclid_mod(128 * 12, 128 * 77)
diff --git a/contents/euclidean_algorithm/code/python/euclidean_example.py b/contents/euclidean_algorithm/code/python/euclidean_example.py
index 367aed512..0badc2ca8 100644
--- a/contents/euclidean_algorithm/code/python/euclidean_example.py
+++ b/contents/euclidean_algorithm/code/python/euclidean_example.py
@@ -13,6 +13,11 @@ def euclid_sub(a, b):
     a = abs(a)
     b = abs(b)
 
+    if a == 0:
+        return b
+    elif b == 0:
+        return a
+
     while a != b:
         if a > b:
             a -= b
diff --git a/contents/euclidean_algorithm/euclidean_algorithm.md b/contents/euclidean_algorithm/euclidean_algorithm.md
index 0de143dac..035e7ae81 100644
--- a/contents/euclidean_algorithm/euclidean_algorithm.md
+++ b/contents/euclidean_algorithm/euclidean_algorithm.md
@@ -24,7 +24,7 @@ The algorithm is a simple way to find the *greatest common divisor* (GCD) of two
 {% sample lang="lisp" %}
 [import:3-12, lang="lisp"](code/clisp/euclidean.lisp)
 {% sample lang="py" %}
-[import:11-22, lang="python"](code/python/euclidean_example.py)
+[import:11-27, lang="python"](code/python/euclidean_example.py)
 {% sample lang="hs" %}
 [import:3-13, lang="haskell"](code/haskell/euclidean_algorithm.hs)
 {% sample lang="rs" %}
diff --git a/contents/flood_fill/code/c/flood_fill.c b/contents/flood_fill/code/c/flood_fill.c
new file mode 100644
index 000000000..d922412a1
--- /dev/null
+++ b/contents/flood_fill/code/c/flood_fill.c
@@ -0,0 +1,253 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct canvas {
+    int max_x, max_y;
+    int *data;
+};
+
+struct point {
+    int x, y;
+};
+
+struct stack {
+    size_t top, capacity;
+    struct point *data;
+};
+
+struct queue {
+    size_t front, back, capacity;
+    struct point *data;
+};
+
+int inbounds(struct point p, struct canvas c) {
+    return (p.x < 0 || p.y < 0 || p.y >= c.max_y || p.x >= c.max_x) ? 0 : 1;
+}
+
+int find_neighbors(struct canvas c, struct point p, int old_val, int new_val,
+        struct point *neighbors) {
+    int cnt = 0;
+    struct point points[4] = {
+        {p.x, p.y + 1},
+        {p.x + 1, p.y},
+        {p.x, p.y - 1},
+        {p.x - 1, p.y}
+    };
+
+    for (int i = 0; i < 4; ++i) {
+        if (inbounds(points[i], c) &&
+                c.data[points[i].x + c.max_x * points[i].y] == old_val) {
+            neighbors[cnt++] = points[i];
+        }
+    }
+
+    return cnt;
+}
+
+struct stack get_stack() {
+    struct stack stk;
+
+    stk.data = malloc(4 * sizeof(struct point));
+    stk.capacity = 4;
+    stk.top = 0;
+
+    return stk;
+}
+
+int stack_empty(struct stack stk) {
+    return stk.top == 0;
+}
+
+void stack_push(struct stack *stk, struct point element) {
+    if (stk->top == stk->capacity) {
+        stk->capacity *= 2;
+        stk->data = realloc(stk->data, stk->capacity * sizeof(stk->data[0]));
+    }
+
+    stk->data[stk->top++] = element;
+}
+
+struct point stack_pop(struct stack *stk) {
+    return stk->data[--stk->top];
+}
+
+void free_stack(struct stack stk) {
+    free(stk.data);
+}
+
+void stack_fill(struct canvas c, struct point p, int old_val, int new_val) {
+    if (old_val == new_val) {
+        return;
+    }
+
+    struct stack stk = get_stack();
+    stack_push(&stk, p);
+
+    while (!stack_empty(stk)) {
+        struct point cur_loc = stack_pop(&stk);
+        if (c.data[cur_loc.x + c.max_x * cur_loc.y] == old_val) {
+            c.data[cur_loc.x + c.max_x * cur_loc.y] = new_val;
+
+            struct point neighbors[4];
+            int cnt = find_neighbors(c, cur_loc, old_val, new_val, neighbors);
+
+            for (int i = 0; i < cnt; ++i) {
+                stack_push(&stk, neighbors[i]);
+            }
+        }
+    }
+
+    free_stack(stk);
+}
+
+struct queue get_queue() {
+    struct queue q;
+
+    q.data = calloc(4, sizeof(struct point));
+    q.front = 0;
+    q.back = 0;
+    q.capacity = 4;
+
+    return q;
+}
+
+int queue_empty(struct queue q) {
+    return q.front == q.back;
+}
+
+void enqueue(struct queue *q, struct point element) {
+    if (q->front == (q->back + 1) % q->capacity) {
+        size_t size = sizeof(q->data[0]);
+        struct point *tmp = calloc((q->capacity * 2), size);
+        memcpy(tmp, q->data + q->front, (q->capacity - q->front) * size);
+        memcpy(tmp + q->capacity - q->front, q->data, (q->front - 1) * size);
+
+        free(q->data);
+
+        q->data = tmp;
+        q->back = q->capacity - 1;
+        q->front = 0;
+        q->capacity *= 2;
+    }
+
+    q->data[q->back] = element;
+    q->back = (q->back + 1) % q->capacity;
+}
+
+struct point dequeue(struct queue *q) {
+    struct point ret = q->data[q->front];
+    q->front = (q->front + 1) % q->capacity;
+
+    return ret;
+}
+
+void free_queue(struct queue q) {
+    free(q.data);
+}
+
+void queue_fill(struct canvas c, struct point p, int old_val, int new_val) {
+    if (old_val == new_val) {
+        return;
+    }
+
+    struct queue q = get_queue(sizeof(struct point *));
+    enqueue(&q, p);
+
+    while (!queue_empty(q)) {
+        struct point cur_loc = dequeue(&q);
+        if (c.data[cur_loc.x + c.max_x * cur_loc.y] == old_val) {
+            c.data[cur_loc.x + c.max_x * cur_loc.y] = new_val;
+
+            struct point neighbors[4];
+            int cnt = find_neighbors(c, cur_loc, old_val, new_val, neighbors);
+
+            for (int i = 0; i < cnt; ++i) {
+                enqueue(&q, neighbors[i]);
+            }
+        }
+    }
+
+    free_queue(q);
+}
+
+void recursive_fill(struct canvas c, struct point p, int old_val,
+        int new_val) {
+
+    if (old_val == new_val) {
+        return;
+    }
+
+    c.data[p.x + c.max_x * p.y] = new_val;
+
+    struct point neighbors[4];
+    int cnt = find_neighbors(c, p, old_val, new_val, neighbors);
+
+    for (int i = 0; i < cnt; ++i) {
+        recursive_fill(c, neighbors[i], old_val, new_val);
+    }
+}
+
+int grid_cmp(int *a, int *b, int size) {
+    for (int i = 0; i < size; ++i) {
+        if (a[i] != b[i]) {
+            return 0;
+        }
+    }
+
+    return 1;
+}
+
+int main() {
+    int grid[25] = {
+        0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0,
+        1, 1, 1, 1, 1,
+        0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0
+    };
+    int grid1[25] = {
+        0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0,
+        1, 1, 1, 1, 1,
+        0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0
+    };
+    int grid2[25] = {
+        0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0,
+        1, 1, 1, 1, 1,
+        0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0
+    };
+    int answer_grid[25] = {
+        1, 1, 1, 1, 1,
+        1, 1, 1, 1, 1,
+        1, 1, 1, 1, 1,
+        0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0
+    };
+
+    struct canvas c = {5, 5, grid};
+    struct canvas c1 = {5, 5, grid1};
+    struct canvas c2 = {5, 5, grid2};
+
+    struct point start_loc = {0, 0};
+
+    int pass_cnt = 0;
+
+    recursive_fill(c, start_loc, 0, 1);
+    pass_cnt += grid_cmp(grid, answer_grid, 25);
+
+    stack_fill(c1, start_loc, 0, 1);
+    pass_cnt += grid_cmp(grid1, answer_grid, 25);
+
+    queue_fill(c2, start_loc, 0, 1);
+    pass_cnt += grid_cmp(grid2, answer_grid, 25);
+
+    printf("Test Summary: | Pass\tTotal\n");
+    printf("Fill Methods  |\t%d\t3\n", pass_cnt);
+
+    return 0;
+}
+
diff --git a/contents/flood_fill/code/coconut/flood_fill.coco b/contents/flood_fill/code/coconut/flood_fill.coco
new file mode 100644
index 000000000..9b0d49d9e
--- /dev/null
+++ b/contents/flood_fill/code/coconut/flood_fill.coco
@@ -0,0 +1,128 @@
+from collections import deque
+import numpy as np
+
+
+data Point(x, y):
+    def __add__(self, other is Point) = Point(self.x + other.x, self.y + other.y)
+
+
+# This function is necessary, because negative indices wrap around the
+# array in Coconut.
+def inbounds(canvas_shape, location is Point) =
+    min(location) >= 0 and location.x < canvas_shape[0] and location.y < canvas_shape[1]
+
+
+def colour(canvas, location is Point, old_value, new_value):
+    if not inbounds(canvas.shape, location):
+        return
+
+    if canvas[location] != old_value:
+        return
+    else:
+        canvas[location] = new_value
+
+
+def find_neighbours(canvas, location is Point, old_value, new_value):
+    possible_neighbours = ((Point(0, 1), Point(1, 0), Point(0, -1), Point(-1, 0))
+                          |> map$(location.__add__))
+
+    yield from possible_neighbours |> filter$(x -> (inbounds(canvas.shape, x) and canvas[x] == old_value))
+
+
+def stack_fill(canvas, location is Point, old_value, new_value):
+    if new_value == old_value or not inbounds(canvas.shape, location):
+        return
+
+    stack = [location]
+
+    while stack:
+        current_location = stack.pop()
+        if canvas[current_location] == old_value:
+            canvas[current_location] = new_value
+            for neighbour in find_neighbours(canvas, current_location, old_value,
+                                             new_value):
+                stack.append(neighbour)
+
+
+def queue_fill(canvas, location is Point, old_value, new_value):
+    if new_value == old_value or not inbounds(canvas.shape, location):
+        return
+
+    queue = deque()
+    queue.append(location)
+
+    canvas[location] = new_value
+
+    while queue:
+        current_location = queue.popleft()
+        for neighbour in find_neighbours(canvas, current_location, old_value,
+                                         new_value):
+            queue.append(neighbour)
+            canvas[neighbour] = new_value
+
+
+def recursive_fill(canvas, location is Point, old_value, new_value):
+    if new_value == old_value or not inbounds(canvas.shape, location):
+        return
+
+    canvas[location] = new_value
+    # consume is important here, because otherwise, the recursive function is not called again
+    consume(
+        find_neighbours(canvas, location, old_value, new_value)
+        |> map$(recursive_fill$(canvas, ?, old_value, new_value))
+    )
+
+if __name__ == '__main__':
+    # Testing setup
+    from collections import namedtuple
+
+    TestResults = namedtuple('TestResults', 'passes failures')
+    pass_count = failure_count = 0
+
+    grid = np.zeros((5, 5))
+    grid[2,:] = 1
+    solution_grid = np.zeros((5, 5))
+    solution_grid[:3,] = 1
+
+    starting_location = Point(0, 0)
+
+
+    # The following is manual unit testing of the function
+    recursive_fill(grid, starting_location, 0, 1)
+    try:
+        assert (grid == solution_grid).all()
+    except AssertionError:
+        print('F', end='')
+        failure_count += 1
+    else:
+        print('.', end='')
+        pass_count += 1
+
+    # Resetting the grid, if everything went well.
+    grid[:2,] = 0
+
+    stack_fill(grid, starting_location, 0, 1)
+    try:
+        assert (grid == solution_grid).all()
+    except AssertionError:
+        print('F', end='')
+        failure_count += 1
+    else:
+        print('.', end='')
+        pass_count += 1
+
+    grid[:2,] = 0
+
+    queue_fill(grid, starting_location, 0, 1)
+    try:
+        assert (grid == solution_grid).all()
+    except AssertionError:
+        print('F', end='')
+        failure_count += 1
+    else:
+        print('.', end='')
+        pass_count += 1
+
+    print('')
+    print(TestResults(pass_count, failure_count))
+
diff --git a/contents/flood_fill/code/julia/flood_fill.jl b/contents/flood_fill/code/julia/flood_fill.jl
index 7658ac808..bc42ac9d0 100644
--- a/contents/flood_fill/code/julia/flood_fill.jl
+++ b/contents/flood_fill/code/julia/flood_fill.jl
@@ -20,20 +20,6 @@ function inbounds(canvas_size, loc)
     end
 end
 
-function color!(canvas, loc::CartesianIndex, old_val, new_val)
-    # bounds check, do not color if no in bounds!
-    if !inbounds(size(canvas), loc)
-        return
-    end
-
-    # Only change color if the element value is the old value
-    if (canvas[loc] != old_val)
-        return
-    else
-        canvas[loc] = new_val
-    end
-end
-
 function find_neighbors(canvas, loc::CartesianIndex, old_val, new_val)
     
     # Finding north, south, east, west neighbors
@@ -65,7 +51,7 @@ function stack_fill!(canvas, loc::CartesianIndex, old_val, new_val)
     while length(s) > 0
         current_loc = pop!(s)
         if canvas[current_loc] == old_val
-            color!(canvas, current_loc, old_val, new_val)
+            canvas[current_loc] = new_val
             possible_neighbors = find_neighbors(canvas, current_loc,
                                                 old_val, new_val)
             for neighbor in possible_neighbors
@@ -86,7 +72,7 @@ function queue_fill!(canvas, loc::CartesianIndex, old_val, new_val)
     enqueue!(q, loc)
 
     # Coloring the initial location
-    color!(canvas, loc, old_val, new_val)
+    canvas[loc] = new_val
 
     while length(q) > 0
         current_loc = dequeue!(q)
@@ -96,7 +82,7 @@ function queue_fill!(canvas, loc::CartesianIndex, old_val, new_val)
 
         # Coloring as we are enqueuing neighbors
         for neighbor in possible_neighbors
-            color!(canvas, neighbor, old_val, new_val)
+            canvas[neighbor] = new_val
             enqueue!(q,neighbor)
         end
         
@@ -109,7 +95,7 @@ function recursive_fill!(canvas, loc::CartesianIndex, old_val, new_val)
         return
     end
 
-    color!(canvas, loc, old_val, new_val)
+    canvas[loc] = new_val
 
     possible_neighbors = find_neighbors(canvas, loc, old_val, new_val)
     for possible_neighbor in possible_neighbors
diff --git a/contents/flood_fill/code/python/flood_fill.py b/contents/flood_fill/code/python/flood_fill.py
new file mode 100644
index 000000000..5b346fa39
--- /dev/null
+++ b/contents/flood_fill/code/python/flood_fill.py
@@ -0,0 +1,89 @@
+from collections import namedtuple
+from queue import Queue
+import numpy as np
+
+Point = namedtuple("Point", "x y")
+
+def inbounds(canvas_shape, p):
+    return min(p) >= 0 and p.x < canvas_shape[0] and p.y < canvas_shape[1]
+
+def find_neighbors(canvas, p, old_val, new_val):
+    # north, south, east, west neighbors
+    possible_neighbors = [
+        Point(p.x, p.y+1),
+        Point(p.x+1, p.y),
+        Point(p.x-1, p.y),
+        Point(p.x, p.y-1)
+    ]
+
+    # exclude the neighbors that go out of bounds and should not be colored
+    neighbors = []
+    for possible_neighbor in possible_neighbors:
+        if inbounds(canvas.shape, possible_neighbor):
+            if canvas[possible_neighbor] == old_val:
+                neighbors.append(possible_neighbor)
+    return neighbors
+
+def stack_fill(canvas, p, old_val, new_val):
+    if old_val == new_val:
+        return
+
+    stack = [p]
+
+    while stack:
+        cur_loc = stack.pop()
+        canvas[cur_loc] = new_val
+        stack += find_neighbors(canvas, cur_loc, old_val, new_val)
+
+def queue_fill(canvas, p, old_val, new_val):
+    if old_val == new_val:
+        return
+
+    q = Queue()
+    q.put(p)
+
+    canvas[p] = new_val
+
+    while not q.empty():
+        cur_loc = q.get()
+        neighbors = find_neighbors(canvas, cur_loc, old_val, new_val)
+
+        for neighbor in neighbors:
+            canvas[neighbor] = new_val
+            q.put(neighbor)
+
+def recursive_fill(canvas, p, old_val, new_val):
+    if old_val == new_val:
+        return
+
+    canvas[p] = new_val
+
+    neighbors = find_neighbors(canvas, p, old_val, new_val)
+    for neighbor in neighbors:
+        recursive_fill(canvas, neighbor, old_val, new_val)
+
+def main():
+    grid = np.zeros((5, 5))
+    grid[2,:] = 1
+    
+    answer = np.zeros((5, 5))
+    answer[:3,] = 1
+
+    c0 = grid.copy()
+    c1 = grid.copy()
+    c2 = grid.copy()
+
+    start_loc = Point(0, 0)
+
+    recursive_fill(c0, start_loc, 0, 1)
+    queue_fill(c1, start_loc, 0, 1)
+    stack_fill(c2, start_loc, 0, 1)
+
+    assert (c0 == answer).all()
+    assert (c1 == answer).all()
+    assert (c2 == answer).all()
+
+    print("Tests Passed")
+
+if __name__ == "__main__":
+    main()
diff --git a/contents/flood_fill/flood_fill.md b/contents/flood_fill/flood_fill.md
index e53707a3c..65cf62c74 100644
--- a/contents/flood_fill/flood_fill.md
+++ b/contents/flood_fill/flood_fill.md
@@ -87,7 +87,13 @@ In code, this might look like this:
 
 {% method %}
 {% sample lang="jl" %}
-[import:37-55, lang:"julia"](code/julia/flood_fill.jl)
+[import:23-41, lang:"julia"](code/julia/flood_fill.jl)
+{% sample lang="c" %}
+[import:28-46, lang:"c"](code/c/flood_fill.c)
+{% sample lang="py" %}
+[import:10-25, lang="python"](code/python/flood_fill.py)
+{% sample lang="coco" %}
+[import:25-29, lang:"coconut"](code/coconut/flood_fill.coco)
 {% endmethod %}
 
 
@@ -101,11 +107,13 @@ In code, it might look like this:
 
 {% method %}
 {% sample lang="jl" %}
-[import:106-118, lang:"julia"](code/julia/flood_fill.jl)
-
-All Julia code snippets for this chapter rely on an exterior `color!(...)` function, defined as
-
-[import:23-35, lang:"julia"](code/julia/flood_fill.jl)
+[import:92-104, lang:"julia"](code/julia/flood_fill.jl)
+{% sample lang="c" %}
+[import:174-189, lang:"c"](code/c/flood_fill.c)
+{% sample lang="py" %}
+[import:55-63, lang="python"](code/python/flood_fill.py)
+{% sample lang="coco" %}
+[import:64-73, lang:"coconut"](code/coconut/flood_fill.coco)
 {% endmethod %}
 
 The above code continues recursing through available neighbors as long as neighbors exist, and this should work so long as we are adding the correct set of neighbors.
@@ -114,7 +122,13 @@ Additionally, it is possible to do the same type of traversal by managing a stac
 
 {% method %}
 {% sample lang="jl" %}
-[import:57-77, lang:"julia"](code/julia/flood_fill.jl)
+[import:43-63, lang:"julia"](code/julia/flood_fill.jl)
+{% sample lang="c" %}
+[import:79-102, lang:"c"](code/c/flood_fill.c)
+{% sample lang="py" %}
+[import:27-36, lang="python"](code/python/flood_fill.py)
+{% sample lang="coco" %}
+[import:32-44, lang:"coconut"](code/coconut/flood_fill.coco)
 {% endmethod %}
 
 This is ultimately the same method of traversal as before; however, because we are managing our own data structure, there are a few distinct differences:
@@ -151,7 +165,13 @@ The code would look something like this:
 
 {% method %}
 {% sample lang="jl" %}
-[import:80-104, lang:"julia"](code/julia/flood_fill.jl)
+[import:66-90, lang:"julia"](code/julia/flood_fill.jl)
+{% sample lang="c" %}
+[import:149-172, lang:"c"](code/c/flood_fill.c)
+{% sample lang="py" %}
+[import:38-53, lang="python"](code/python/flood_fill.py)
+{% sample lang="coco" %}
+[import:47-61, lang:"coconut"](code/coconut/flood_fill.coco)
 {% endmethod %}
 
 Now, there is a small trick in this code that must be considered to make sure it runs optimally.
@@ -228,6 +248,12 @@ After, we will fill in the left-hand side of the array to be all ones by choosin
 {% method %}
 {% sample lang="jl" %}
 [import, lang:"julia"](code/julia/flood_fill.jl)
+{% sample lang="c" %}
+[import, lang:"c"](code/c/flood_fill.c)
+{% sample lang="py" %}
+[import:, lang="python"](code/python/flood_fill.py)
+{% sample lang="coco" %}
+[import, lang:"coconut"](code/coconut/flood_fill.coco)
 {% endmethod %}
 
 
diff --git a/contents/huffman_encoding/code/python/huffman.py b/contents/huffman_encoding/code/python/huffman.py
index 1e1cc541e..87fa776fa 100644
--- a/contents/huffman_encoding/code/python/huffman.py
+++ b/contents/huffman_encoding/code/python/huffman.py
@@ -29,11 +29,17 @@ def build_huffman_tree(message):
         # insert the new tree there
         trees.insert(index, (new_tree, new_weight))
 
-    huffman_tree = trees[0][0]
+    # Return an empty list if the message was empty, else the tree
+    huffman_tree = [] if not trees else trees[0][0]
     return huffman_tree
 
 # constructs the mapping with recursion
 def build_codebook(tree, code=''):
+    # Check whether our tree contains more than 1 element or not
+    if not tree:
+        return []
+    elif type(tree) != list:
+        return [(tree, '0')]
 
     codebook = []
 
diff --git a/contents/huffman_encoding/code/scratch/huffman.svg b/contents/huffman_encoding/code/scratch/huffman.svg
new file mode 100644
index 000000000..5f633b8ce
--- /dev/null
+++ b/contents/huffman_encoding/code/scratch/huffman.svg
@@ -0,0 +1,98 @@
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a 4 4 0 0 1 -4 -4 Z"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(8 17)">change</text><g transform="translate(68 8)"><rect rx="4" ry="4" x="0" y="0" width="60" height="32" class="sb3-variables sb3-input sb3-input-dropdown"/><text class="sb3-label sb3-literal-dropdown" x="0" y="13" transform="translate(18 9)">i</text><use xmlns:ns97="http://www.w3.org/1999/xlink" ns97:href="#sb3-dropdownArrow" transform="translate(36 13)"/></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(136 17)">by</text><g transform="translate(161 8)"><rect rx="16" ry="16" x="0" y="0" width="40" height="32" class="sb3-variables sb3-input sb3-input-number"/><text class="sb3-label sb3-literal-number" x="0" y="13" transform="translate(13 9)">-1</text></g></g></g></g></g><g transform="translate(0 5784)"><g transform="translate(2 1)"><path class="sb3-custom" d="M 0 20 a 20 20 0 0 1 20 -20 L 260 0 a 20,20 0 0,1 20,20 L 280 80 a 4 4 0 0 1 -4 4 L 48 84 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 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4 4 c 1 1 2 2 4 2 h 12 c 2 0 3 -1 4 -2 l 4 -4 c 1 -1 2 -2 4 -2 L 181 0 a 4 4 0 0 1 4 4 L 185 44 a 4 4 0 0 1 -4 4 L 48 48 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 4 48 a 4 4 0 0 1 -4 -4 Z"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(8 17)">set</text><g transform="translate(48 8)"><rect rx="4" ry="4" x="0" y="0" width="60" height="32" class="sb3-variables sb3-input sb3-input-dropdown"/><text class="sb3-label sb3-literal-dropdown" x="0" y="13" transform="translate(18 9)">i</text><use xmlns:ns113="http://www.w3.org/1999/xlink" ns113:href="#sb3-dropdownArrow" transform="translate(36 13)"/></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(116 17)">to</text><g transform="translate(137 8)"><rect rx="16" ry="16" x="0" y="0" width="40" height="32" class="sb3-variables sb3-input sb3-input-number"/><text class="sb3-label sb3-literal-number" x="0" y="13" transform="translate(15.5 9)">1</text></g></g><g transform="translate(2 181)"><path class="sb3-control" d="M 0 4 A 4 4 0 0 1 4 0 H 12 c 2 0 3 1 4 2 l 4 4 c 1 1 2 2 4 2 h 12 c 2 0 3 -1 4 -2 l 4 -4 c 1 -1 2 -2 4 -2 L 214 0 a 4 4 0 0 1 4 4 L 218 52 a 4 4 0 0 1 -4 4 L 64 56 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 20 56 a 4 4 0 0 0 -4 4 L 16 164 a 4 4 0 0 0 4 4 L 28 168 c 2 0 3 1 4 2 l 4 4 c 1 1 2 2 4 2 h 12 c 2 0 3 -1 4 -2 l 4 -4 c 1 -1 2 -2 4 -2 L 214 168 a 4 4 0 0 1 4 4 L 218 196 a 4 4 0 0 1 -4 4 L 48 200 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 4 200 a 4 4 0 0 1 -4 -4 Z"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(8 21)">repeat</text><g transform="translate(61 4)"><rect class="sb3-operators" rx="24" ry="24" x="0" y="0" width="149" height="48"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 17)">length</text><text class="sb3-label sb3-" x="0" y="13" transform="translate(61 17)">of</text><g transform="translate(82 4)"><rect class="sb3-custom-arg" rx="20" ry="20" x="0" y="0" width="63" height="40"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 13)">string</text></g></g><use xmlns:ns114="http://www.w3.org/1999/xlink" ns114:href="#sb3-loopArrow" transform="translate(186 172)"/><g transform="translate(16 55)"><g transform="translate(0 1)"><path class="sb3-variables" d="M 0 4 A 4 4 0 0 1 4 0 H 12 c 2 0 3 1 4 2 l 4 4 c 1 1 2 2 4 2 h 12 c 2 0 3 -1 4 -2 l 4 -4 c 1 -1 2 -2 4 -2 L 484 0 a 4 4 0 0 1 4 4 L 488 60 a 4 4 0 0 1 -4 4 L 48 64 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 4 64 a 4 4 0 0 1 -4 -4 Z"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(8 25)">set</text><g transform="translate(48 16)"><rect rx="4" ry="4" x="0" y="0" width="69" height="32" class="sb3-variables sb3-input sb3-input-dropdown"/><text class="sb3-label sb3-literal-dropdown" x="0" y="13" transform="translate(11 9)">tmp</text><use xmlns:ns115="http://www.w3.org/1999/xlink" ns115:href="#sb3-dropdownArrow" transform="translate(45 13)"/></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(125 25)">to</text><g transform="translate(146 4)"><rect class="sb3-operators" rx="28" ry="28" x="0" y="0" width="334" height="56"/><g transform="translate(4 4)"><rect class="sb3-operators" rx="24" ry="24" x="0" y="0" width="121" height="48"/><g transform="translate(4 4)"><rect class="sb3-variables" rx="20" ry="20" x="0" y="0" width="51" height="40"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 13)">tmp</text></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(63 17)">*</text><g transform="translate(77 8)"><rect rx="16" ry="16" x="0" y="0" width="40" height="32" class="sb3-operators sb3-input sb3-input-number"/><text class="sb3-label sb3-literal-number" x="0" y="13" transform="translate(15.5 9)">2</text></g></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(133 21)">+</text><g transform="translate(150 4)"><rect class="sb3-operators" rx="24" ry="24" x="0" y="0" width="180" height="48"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 17)">letter</text><g transform="translate(56 4)"><rect class="sb3-variables" rx="20" ry="20" x="0" y="0" width="28" height="40"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 13)">i</text></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(92 17)">of</text><g transform="translate(113 4)"><rect class="sb3-custom-arg" rx="20" ry="20" x="0" y="0" width="63" height="40"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 13)">string</text></g></g></g></g><g transform="translate(0 65)"><path class="sb3-variables" d="M 0 4 A 4 4 0 0 1 4 0 H 12 c 2 0 3 1 4 2 l 4 4 c 1 1 2 2 4 2 h 12 c 2 0 3 -1 4 -2 l 4 -4 c 1 -1 2 -2 4 -2 L 205 0 a 4 4 0 0 1 4 4 L 209 44 a 4 4 0 0 1 -4 4 L 48 48 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 4 48 a 4 4 0 0 1 -4 -4 Z"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(8 17)">change</text><g transform="translate(68 8)"><rect rx="4" ry="4" x="0" y="0" width="60" height="32" class="sb3-variables sb3-input sb3-input-dropdown"/><text class="sb3-label sb3-literal-dropdown" x="0" y="13" transform="translate(18 9)">i</text><use xmlns:ns116="http://www.w3.org/1999/xlink" ns116:href="#sb3-dropdownArrow" transform="translate(36 13)"/></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(136 17)">by</text><g transform="translate(161 8)"><rect rx="16" ry="16" x="0" y="0" width="40" height="32" class="sb3-variables sb3-input sb3-input-number"/><text class="sb3-label sb3-literal-number" x="0" y="13" transform="translate(15.5 9)">1</text></g></g></g></g><g transform="translate(2 381)"><path class="sb3-control" d="M 0 4 A 4 4 0 0 1 4 0 H 12 c 2 0 3 1 4 2 l 4 4 c 1 1 2 2 4 2 h 12 c 2 0 3 -1 4 -2 l 4 -4 c 1 -1 2 -2 4 -2 L 156 0 a 4 4 0 0 1 4 4 L 160 44 a 4 4 0 0 1 -4 4 L 64 48 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 20 48 a 4 4 0 0 0 -4 4 L 16 100 a 4 4 0 0 0 4 4 L 28 104 c 2 0 3 1 4 2 l 4 4 c 1 1 2 2 4 2 h 12 c 2 0 3 -1 4 -2 l 4 -4 c 1 -1 2 -2 4 -2 L 156 104 a 4 4 0 0 1 4 4 L 160 132 a 4 4 0 0 1 -4 4 L 48 136 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 4 136 a 4 4 0 0 1 -4 -4 Z"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(8 17)">repeat</text><g transform="translate(61 4)"><rect class="sb3-variables" rx="20" ry="20" x="0" y="0" width="51" height="40"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 13)">tmp</text></g><use xmlns:ns117="http://www.w3.org/1999/xlink" ns117:href="#sb3-loopArrow" transform="translate(128 108)"/><g transform="translate(16 47)"><g transform="translate(0 1)"><path class="sb3-variables" d="M 0 4 A 4 4 0 0 1 4 0 H 12 c 2 0 3 1 4 2 l 4 4 c 1 1 2 2 4 2 h 12 c 2 0 3 -1 4 -2 l 4 -4 c 1 -1 2 -2 4 -2 L 639 0 a 4 4 0 0 1 4 4 L 643 52 a 4 4 0 0 1 -4 4 L 48 56 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 4 56 a 4 4 0 0 1 -4 -4 Z"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(8 21)">set</text><g transform="translate(48 12)"><rect rx="4" ry="4" x="0" y="0" width="103" height="32" class="sb3-variables sb3-input sb3-input-dropdown"/><text class="sb3-label sb3-literal-dropdown" x="0" y="13" transform="translate(11 9)">decoded</text><use xmlns:ns118="http://www.w3.org/1999/xlink" ns118:href="#sb3-dropdownArrow" transform="translate(79 13)"/></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(159 21)">to</text><g transform="translate(180 4)"><rect class="sb3-operators" rx="24" ry="24" x="0" y="0" width="455" height="48"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 17)">join</text><g transform="translate(45 4)"><rect class="sb3-variables" rx="20" ry="20" x="0" y="0" width="85" height="40"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 13)">decoded</text></g><g transform="translate(138 4)"><rect class="sb3-list" rx="20" ry="20" x="0" y="0" width="313" height="40"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 13)">item</text><g transform="translate(50 4)"><rect rx="16" ry="16" x="0" y="0" width="40" height="32" class="sb3-list sb3-input sb3-input-number"/><text class="sb3-label sb3-literal-number" x="0" y="13" transform="translate(15.5 9)">1</text></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(98 13)">of</text><g transform="translate(119 4)"><rect rx="4" ry="4" x="0" y="0" width="182" height="32" class="sb3-list sb3-input sb3-input-dropdown"/><text class="sb3-label sb3-literal-dropdown" x="0" y="13" transform="translate(11 9)">Letter-Node Pointer</text><use xmlns:ns119="http://www.w3.org/1999/xlink" ns119:href="#sb3-dropdownArrow" transform="translate(158 13)"/></g></g></g></g></g></g></g><g transform="translate(0 7376)"><g transform="translate(2 1)"><path class="sb3-events" d="M 0 16 c 25,-22 71,-22 96,0 L 135 16 a 4 4 0 0 1 4 4 L 139 60 a 4 4 0 0 1 -4 4 L 48 64 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 4 64 a 4 4 0 0 1 -4 -4 Z"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(8 33)">when</text><use xmlns:ns120="http://www.w3.org/1999/xlink" ns120:href="#sb3-greenFlag" transform="translate(54 27)"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(82 33)">clicked</text></g><g transform="translate(2 65)"><path class="sb3-variables" d="M 0 4 A 4 4 0 0 1 4 0 H 12 c 2 0 3 1 4 2 l 4 4 c 1 1 2 2 4 2 h 12 c 2 0 3 -1 4 -2 l 4 -4 c 1 -1 2 -2 4 -2 L 348 0 a 4 4 0 0 1 4 4 L 352 44 a 4 4 0 0 1 -4 4 L 48 48 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 4 48 a 4 4 0 0 1 -4 -4 Z"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(8 17)">set</text><g transform="translate(48 8)"><rect rx="4" ry="4" x="0" y="0" width="143" height="32" class="sb3-variables sb3-input sb3-input-dropdown"/><text class="sb3-label sb3-literal-dropdown" x="0" y="13" transform="translate(11 9)">to be encoded</text><use xmlns:ns121="http://www.w3.org/1999/xlink" ns121:href="#sb3-dropdownArrow" transform="translate(119 13)"/></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(199 17)">to</text><g transform="translate(220 8)"><rect rx="16" ry="16" x="0" y="0" width="124" height="32" class="sb3-variables sb3-input sb3-input-string"/><text class="sb3-label sb3-literal-string" x="0" y="13" transform="translate(11 9)">bibbity bobbity</text></g></g><g transform="translate(2 113)"><path class="sb3-custom" d="M 0 4 A 4 4 0 0 1 4 0 H 12 c 2 0 3 1 4 2 l 4 4 c 1 1 2 2 4 2 h 12 c 2 0 3 -1 4 -2 l 4 -4 c 1 -1 2 -2 4 -2 L 271 0 a 4 4 0 0 1 4 4 L 275 44 a 4 4 0 0 1 -4 4 L 48 48 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 4 48 a 4 4 0 0 1 -4 -4 Z"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(8 17)">Huffman</text><text class="sb3-label sb3-" x="0" y="13" transform="translate(73 17)">encodes</text><g transform="translate(141 4)"><rect class="sb3-variables" rx="20" ry="20" x="0" y="0" width="126" height="40"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 13)">to</text><text class="sb3-label sb3-" x="0" y="13" transform="translate(30 13)">be</text><text class="sb3-label sb3-" x="0" y="13" transform="translate(53 13)">encoded</text></g></g><g transform="translate(2 161)"><path class="sb3-looks" d="M 0 4 A 4 4 0 0 1 4 0 H 12 c 2 0 3 1 4 2 l 4 4 c 1 1 2 2 4 2 h 12 c 2 0 3 -1 4 -2 l 4 -4 c 1 -1 2 -2 4 -2 L 576 0 a 4 4 0 0 1 4 4 L 580 52 a 4 4 0 0 1 -4 4 L 48 56 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 4 56 a 4 4 0 0 1 -4 -4 Z"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(8 21)">say</text><g transform="translate(48 4)"><rect class="sb3-operators" rx="24" ry="24" x="0" y="0" width="381" height="48"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 17)">join</text><g transform="translate(45 8)"><rect rx="16" ry="16" x="0" y="0" width="239" height="32" class="sb3-operators sb3-input sb3-input-string"/><text class="sb3-label sb3-literal-string" x="0" y="13" transform="translate(11 9)">Encoded, the string looks like: </text></g><g transform="translate(292 4)"><rect class="sb3-variables" rx="20" ry="20" x="0" y="0" width="85" height="40"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 13)">encoded</text></g></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(437 21)">for</text><g transform="translate(464 12)"><rect rx="16" ry="16" x="0" y="0" width="40" height="32" class="sb3-looks sb3-input sb3-input-number"/><text class="sb3-label sb3-literal-number" x="0" y="13" transform="translate(15.5 9)">3</text></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(512 21)">seconds</text></g><g transform="translate(2 217)"><path class="sb3-custom" d="M 0 4 A 4 4 0 0 1 4 0 H 12 c 2 0 3 1 4 2 l 4 4 c 1 1 2 2 4 2 h 12 c 2 0 3 -1 4 -2 l 4 -4 c 1 -1 2 -2 4 -2 L 230 0 a 4 4 0 0 1 4 4 L 234 44 a 4 4 0 0 1 -4 4 L 48 48 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 4 48 a 4 4 0 0 1 -4 -4 Z"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(8 17)">Huffman</text><text class="sb3-label sb3-" x="0" y="13" transform="translate(73 17)">decodes</text><g transform="translate(141 4)"><rect class="sb3-variables" rx="20" ry="20" x="0" y="0" width="85" height="40"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 13)">encoded</text></g></g><g transform="translate(2 265)"><path class="sb3-looks" d="M 0 4 A 4 4 0 0 1 4 0 H 12 c 2 0 3 1 4 2 l 4 4 c 1 1 2 2 4 2 h 12 c 2 0 3 -1 4 -2 l 4 -4 c 1 -1 2 -2 4 -2 L 607 0 a 4 4 0 0 1 4 4 L 611 52 a 4 4 0 0 1 -4 4 L 48 56 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 4 56 a 4 4 0 0 1 -4 -4 Z"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(8 21)">say</text><g transform="translate(48 4)"><rect class="sb3-operators" rx="24" ry="24" x="0" y="0" width="412" height="48"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 17)">join</text><g transform="translate(45 8)"><rect rx="16" ry="16" x="0" y="0" width="270" height="32" class="sb3-operators sb3-input sb3-input-string"/><text class="sb3-label sb3-literal-string" x="0" y="13" transform="translate(11 9)">And decoded, the string looks like: </text></g><g transform="translate(323 4)"><rect class="sb3-variables" rx="20" ry="20" x="0" y="0" width="85" height="40"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 13)">decoded</text></g></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(468 21)">for</text><g transform="translate(495 12)"><rect rx="16" ry="16" x="0" y="0" width="40" height="32" class="sb3-looks sb3-input sb3-input-number"/><text class="sb3-label sb3-literal-number" x="0" y="13" transform="translate(15.5 9)">3</text></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(543 21)">seconds</text></g><g transform="translate(2 321)"><path class="sb3-looks" d="M 0 4 A 4 4 0 0 1 4 0 H 12 c 2 0 3 1 4 2 l 4 4 c 1 1 2 2 4 2 h 12 c 2 0 3 -1 4 -2 l 4 -4 c 1 -1 2 -2 4 -2 L 919 0 a 4 4 0 0 1 4 4 L 923 76 a 4 4 0 0 1 -4 4 L 48 80 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 4 80 a 4 4 0 0 1 -4 -4 Z"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(8 33)">say</text><g transform="translate(48 4)"><rect class="sb3-operators" rx="36" ry="36" x="0" y="0" width="724" height="72"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 29)">join</text><g transform="translate(45 4)"><rect class="sb3-operators" rx="32" ry="32" x="0" y="0" width="616" height="64"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 25)">join</text><g transform="translate(45 16)"><rect rx="16" ry="16" x="0" y="0" width="277" height="32" class="sb3-operators sb3-input sb3-input-string"/><text class="sb3-label sb3-literal-string" x="0" y="13" transform="translate(11 9)">As opposed to the original, which is </text></g><g transform="translate(330 4)"><rect class="sb3-operators" rx="28" ry="28" x="0" y="0" width="282" height="56"/><g transform="translate(4 4)"><rect class="sb3-operators" rx="24" ry="24" x="0" y="0" width="212" height="48"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 17)">length</text><text class="sb3-label sb3-" x="0" y="13" transform="translate(61 17)">of</text><g transform="translate(82 4)"><rect class="sb3-variables" rx="20" ry="20" x="0" y="0" width="126" height="40"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 13)">to</text><text class="sb3-label sb3-" x="0" y="13" transform="translate(30 13)">be</text><text class="sb3-label sb3-" x="0" y="13" transform="translate(53 13)">encoded</text></g></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(224 21)">*</text><g transform="translate(238 12)"><rect rx="16" ry="16" x="0" y="0" width="40" height="32" class="sb3-operators sb3-input sb3-input-number"/><text class="sb3-label sb3-literal-number" x="0" y="13" transform="translate(15.5 9)">8</text></g></g></g><g transform="translate(669 20)"><rect rx="16" ry="16" x="0" y="0" width="51" height="32" class="sb3-operators sb3-input sb3-input-string"/><text class="sb3-label sb3-literal-string" x="0" y="13" transform="translate(11 9)">bits,</text></g></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(780 33)">for</text><g transform="translate(807 24)"><rect rx="16" ry="16" x="0" y="0" width="40" height="32" class="sb3-looks sb3-input sb3-input-number"/><text class="sb3-label sb3-literal-number" x="0" y="13" transform="translate(15.5 9)">2</text></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(855 33)">seconds</text></g><g transform="translate(2 401)"><path class="sb3-looks" d="M 0 4 A 4 4 0 0 1 4 0 H 12 c 2 0 3 1 4 2 l 4 4 c 1 1 2 2 4 2 h 12 c 2 0 3 -1 4 -2 l 4 -4 c 1 -1 2 -2 4 -2 L 703 0 a 4 4 0 0 1 4 4 L 707 68 a 4 4 0 0 1 -4 4 L 48 72 c -2 0 -3 1 -4 2 l -4 4 c -1 1 -2 2 -4 2 h -12 c -2 0 -3 -1 -4 -2 l -4 -4 c -1 -1 -2 -2 -4 -2 L 4 72 a 4 4 0 0 1 -4 -4 Z"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(8 29)">say</text><g transform="translate(48 4)"><rect class="sb3-operators" rx="32" ry="32" x="0" y="0" width="508" height="64"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 25)">join</text><g transform="translate(45 4)"><rect class="sb3-operators" rx="28" ry="28" x="0" y="0" width="411" height="56"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 21)">join</text><g transform="translate(45 12)"><rect rx="16" ry="16" x="0" y="0" width="183" height="32" class="sb3-operators sb3-input sb3-input-string"/><text class="sb3-label sb3-literal-string" x="0" y="13" transform="translate(11 9)">The encoded has size </text></g><g transform="translate(236 4)"><rect class="sb3-operators" rx="24" ry="24" x="0" y="0" width="171" height="48"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 17)">length</text><text class="sb3-label sb3-" x="0" y="13" transform="translate(61 17)">of</text><g transform="translate(82 4)"><rect class="sb3-variables" rx="20" ry="20" x="0" y="0" width="85" height="40"/><text class="sb3-label sb3-" x="0" y="13" transform="translate(12 13)">encoded</text></g></g></g><g transform="translate(464 16)"><rect rx="16" ry="16" x="0" y="0" width="40" height="32" class="sb3-operators sb3-input sb3-input-string"/><text class="sb3-label sb3-literal-string" x="0" y="13" transform="translate(18 9)">.</text></g></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(564 29)">for</text><g transform="translate(591 20)"><rect rx="16" ry="16" x="0" y="0" width="40" height="32" class="sb3-looks sb3-input sb3-input-number"/><text class="sb3-label sb3-literal-number" x="0" y="13" transform="translate(15.5 9)">1</text></g><text class="sb3-label sb3-" x="0" y="13" transform="translate(639 29)">seconds</text></g></g></g></svg>
\ No newline at end of file
diff --git a/contents/huffman_encoding/code/scratch/huffman.txt b/contents/huffman_encoding/code/scratch/huffman.txt
new file mode 100644
index 000000000..1e1a84fa6
--- /dev/null
+++ b/contents/huffman_encoding/code/scratch/huffman.txt
@@ -0,0 +1,155 @@
+define Huffman encodes (string)
+set [encoded v] to () // empty here
+if <(string) = ()> then // empty here
+else
+    delete all of [Letter-Node Pointer v]
+    delete all of [Nodes' Values List v]
+    delete all of [Operating Nodes' List v]
+    delete all of [Node-lhs Index v]
+    delete all of [Node-rhs Index v]
+    delete all of [bit list v]
+    delete all of [codebook v]
+    initialize leaves with (string)
+    make tree
+    if <(0) = (item (root) of [Node-lhs Index v])> then
+        binary count // special care: see issue #659
+    else
+        repeat (length of [Letter-Node Pointer v])
+            add (plcaceholder) to [codebook v]
+        end
+        generate codebook from (root)
+        format (string) using codebook
+    end
+end
+
+define initialize leaves with (string)
+set [i v] to (1)
+repeat (length of (string))
+    if <[Letter-Node Pointer v] contains (letter (i) of (string))> then // increment: if didn't exist, add it
+        set [temp v] to ((1) + (item (item # of (letter (i) of (string)) in [Letter-Node Pointer v]) of [Nodes' Values List v]))
+        replace item (item # of (letter (i) of (string)) in [Letter-Node Pointer v]) of [Nodes' Values List v] with (tmp)
+    else
+        add (1) to [Nodes' Values List v]
+        add (letter (i) of (string)) to [Letter-Node Pointer v]
+    end
+    change [i v] by (1)
+end
+
+define Make tree
+set [i v] to (1)
+repeat (length of [Nodes' Values List v]) // initialize
+    add (item (i) of [Nodes' Values List v]) to [Operating Nodes' List v]
+    add (0) to [Node-lhs Index v] // leaves don't have children
+    add (0) to [Node-rhs Index v]
+    change [i v] by (1)
+end
+set [count v] to (length of [Nodes' Values List v])
+repeat until <(count) = (1)>
+    set [i v] to (2) // find smallest 2 nodes
+    set [minimum v] to (item (1) of [Operating Nodes' List v])
+    set [lhs-index v] to (1)
+    set [rhs-index v] to (1)
+    repeat ((length of [Operating Nodes' List]) - (1))
+        if <(item (i) of [Operating Nodes' List v]) < (minimum)> then
+            set [minimum v] to (item (i) of [Operating Nodes' List v])
+            set [lhs-index v] to (i)
+        end
+        change [i v] by (1)
+    end
+    set [i v] to (2)
+    replace item (lhs-index) of [Operating Nodes' List v] with (2147483647) // Int.MaxValue
+    set [2nd minimum v] to (item (1) of [Operating Nodes' List v])
+    repeat ((length of [Operating Nodes' List]) - (1))
+        if <(item (i) of [Operating Nodes' List v]) < (2nd minimum)> then
+            set [2nd minimum v] to (item (i) of [Operating Nodes' List v])
+            set [rhs-index v] to (i)
+        end
+        change [i v] by (1)
+    end
+    set [i v] to (2)
+    replace item (rhs-index) of [Operating Nodes' List v] with (2147483647) // Int.MaxValue
+    change [count v] by (-1)
+    add ((minimum) + (2nd minimum)) to [Nodes' Values List v]
+    add ((minimum) + (2nd minimum)) to [Operating Nodes' List v]
+    add (lhs-index) to [Node-lhs Index v]
+    add (rhs-index) to [Node-rhs Index v]
+end
+set [root v] to (length of [Nodes' Values List])
+
+define generate codebook from (root) // depth-first search
+if <(0) = (item (root) of [Node-lhs Index v])> then // reached a leaf
+    set [tmp v] to () // empty here
+    set [i v] to (1)
+    repeat (length of [bit list v])
+        set [tmp v] to (join (tmp) (item (i) of [bit list v]))
+        change [i v] by (1)
+    end
+    replace item (root) of [codebook v] with (tmp)
+else
+    add (1) to [bit list v] // 1 for lhs
+    generate codebook from (item (root) of [Node-lhs Index v])
+    delete (length of [bit list v]) of [bit list v]
+    add (0) to [bit list v] // 0 for rhs
+    generate codebook from (item (root) of [Node-rhs Index v])
+    delete (length of [bit list v]) of [bit list v]
+end
+
+define format (string) using codebook
+set [i v] to (1)
+repeat (length of (string))
+    set [encoded v] to (join (encoded) (item (item # of (letter (i) of (string)) in [Letter-Node Pointer v]) of [codebook v]))
+    change [i v] by (1)
+end
+
+define binary count
+set [tmp v] to (item (1) of [Nodes' Values List v])
+repeat until <(0) = (tmp)>
+    add ((tmp) mod (2)) to [bit list v]
+    set [tmp v] to (((tmp) - ((tmp) mod (2))) / (2))
+end
+set [i v] to (length of [bit list v])
+repeat until <(0) = (i)>
+    set [encoded v] to (join (encoded) (item (i) of [bit list v]))
+    change [i v] by (-1)
+end
+
+define Huffman decodes (string)
+set [decoded v] to () // empty here
+if <(1) = (length of [Letter-Node Pointer v])> then
+    binary resume using (string) // special care: see issue #659
+else
+    set [i v] to (1)
+    set [index v] to (root)
+    repeat (length of (string))
+        if <(letter (i) of (string)) = (1)> then
+            set [index v] to (item (index) of [Node-lhs Index v])
+        else
+            set [index v] to (item (index) of [Node-rhs Index v])
+        end
+        if <(item (index) of [Node-lhs Index v]) = (0)> then
+            set [decoded v] to (join (decoded) (item (index) of [Letter-Node Pointer v]))
+            set [index v] to (root)
+        end
+        change [i v] by (1)
+    end
+end
+
+define binary resume using (string)
+set [tmp v] to (0)
+set [i v] to (1)
+repeat (length of (string))
+    set [tmp v] to (((tmp) * (2)) + (letter (i) of (string)))
+    change [i v] by (1)
+end
+repeat (tmp)
+    set [decoded v] to (join (decoded) (item (1) of [Letter-Node Pointer v]))
+end
+
+when @greenflag clicked
+set [to be encoded v] to [bibbity bobbity]
+Huffman encodes (to be encoded)
+say (join [Encoded, the string looks like: ] (encoded)) for (3) seconds
+Huffman decodes (encoded)
+say (join [And decoded, the string looks like: ] (decoded)) for (3) seconds
+say (join (join [As opposed to the original, which is ] ((length of (to be encoded)) * (8))) [bits,]) for (2) seconds
+say (join (join [The encoded has size ] (length of (encoded))) [.]) for (1) seconds
diff --git a/contents/huffman_encoding/huffman_encoding.md b/contents/huffman_encoding/huffman_encoding.md
index 885a81ab4..f51505b32 100644
--- a/contents/huffman_encoding/huffman_encoding.md
+++ b/contents/huffman_encoding/huffman_encoding.md
@@ -93,6 +93,11 @@ Whether you use a stack or straight-up recursion also depends on the language, b
 [import, lang:"asm-x64"](code/asm-x64/huffman.s)
 {% sample lang="scala" %}
 [import, lang:"scala"](code/scala/huffman_encoding.scala)
+{% sample lang="scratch" %}
+The code snippet was taken from this [scratch project](https://scratch.mit.edu/projects/389604255/)
+<p>
+    <img  class="center" src="code/scratch/huffman.svg" width="700" />
+</p>
 {% endmethod %}
 
 <script>
diff --git a/contents/monte_carlo_integration/code/python/monte_carlo.py b/contents/monte_carlo_integration/code/python/monte_carlo.py
index 041839dc2..c21bb054e 100644
--- a/contents/monte_carlo_integration/code/python/monte_carlo.py
+++ b/contents/monte_carlo_integration/code/python/monte_carlo.py
@@ -19,7 +19,7 @@ def monte_carlo(n_samples, radius = 1):
 		if(in_circle(x, y, radius)):
 			in_circle_count += 1
 
-	# Since we've generated points in upper left quadrant ([0,radius], [0, radius])
+	# Since we've generated points in upper right quadrant ([0,radius], [0, radius])
 	# We need to multiply the number of points by 4	
 	pi_estimate = 4 * in_circle_count / (n_samples)
 
diff --git a/contents/verlet_integration/code/nim/verlet.nim b/contents/verlet_integration/code/nim/verlet.nim
index fc0ae08f8..d88a2e586 100644
--- a/contents/verlet_integration/code/nim/verlet.nim
+++ b/contents/verlet_integration/code/nim/verlet.nim
@@ -1,4 +1,4 @@
-proc verlet(pos_in, acc, dt: float): float =
+func verlet(pos_in, acc, dt: float): float =
   var
     pos: float = pos_in
     prevPos: float = pos
@@ -11,9 +11,9 @@ proc verlet(pos_in, acc, dt: float): float =
     pos = pos * 2 - prevPos + acc * dt * dt
     prevPos = tempPos
 
-  return time
+  time
 
-proc stormerVerlet(pos_in, acc, dt: float): (float, float) =
+func stormerVerlet(pos_in, acc, dt: float): (float, float) =
   var
     pos: float = pos_in
     prevPos: float = pos
@@ -29,9 +29,9 @@ proc stormerVerlet(pos_in, acc, dt: float): (float, float) =
 
     vel += acc * dt
 
-  return (time, vel)
+  (time, vel)
 
-proc velocityVerlet(pos_in, acc, dt: float): (float, float) =
+func velocityVerlet(pos_in, acc, dt: float): (float, float) =
   var
     pos: float = pos_in
     time: float = 0.0
@@ -42,15 +42,16 @@ proc velocityVerlet(pos_in, acc, dt: float): (float, float) =
     pos += vel * dt + 0.5 * acc * dt * dt
     vel += acc * dt
 
-  return (time, vel)
+  (time, vel)
 
-let timeV = verlet(5.0, -10.0, 0.01)
-echo "Time for Verlet integration is: ", timeV
+when isMainModule:
+  let timeV = verlet(5.0, -10.0, 0.01)
+  echo "Time for Verlet integration is: ", timeV
 
-let (timeSV, velSV) = stormerVerlet(5.0, -10.0, 0.01)
-echo "Time for Stormer Verlet integration is: ", timeSV
-echo "Velocity for Stormer Verlet integration is: ", velSV
+  let (timeSV, velSV) = stormerVerlet(5.0, -10.0, 0.01)
+  echo "Time for Stormer Verlet integration is: ", timeSV
+  echo "Velocity for Stormer Verlet integration is: ", velSV
 
-let (timeVV, velVV) = velocityVerlet(5.0, -10.0, 0.01)
-echo "Time for velocity Verlet integration is: ", timeVV
-echo "Velocity for velocity Verlet integration is: ", velVV
+  let (timeVV, velVV) = velocityVerlet(5.0, -10.0, 0.01)
+  echo "Time for velocity Verlet integration is: ", timeVV
+  echo "Velocity for velocity Verlet integration is: ", velVV
diff --git a/res/languages.gif b/res/languages.gif
new file mode 100644
index 000000000..a9716e073
Binary files /dev/null and b/res/languages.gif differ
diff --git a/styles/website.css b/styles/website.css
index 4853a7a2d..eeb088889 100644
--- a/styles/website.css
+++ b/styles/website.css
@@ -28,3 +28,25 @@ img.center {
 #book-search-input input, #book-search-input input:focus, #book-search-input input:hover{
   color: #222;
 }
+
+@media print {
+	/* Hide side bar */
+	.book-summary {
+		display: none;
+	}
+
+	/*Hide top bar*/
+	.book-header {
+		display: none;
+	}
+
+	/*Hide left and right navigation arrows*/
+	.navigation {
+		display: none;
+	}
+	
+	/*Make sure all content is displayed and not just the first page*/
+	.book-body {
+		position: static;
+	}
+}