gfx readme

Author: ssloy

README.md

@@ -59,10 +59,19 @@ It is so dull to compute Fibonacci numbers, so here are more eyecandy examples f
 make gfx
 ```
 ### Mandelbrot set
-![](https://raw.githubusercontent.com/ssloy/ssloy.github.io/main/docs/tinycompiler/gfx/mandelbrot.png)
+<img src="https://raw.githubusercontent.com/ssloy/ssloy.github.io/main/docs/tinycompiler/gfx/mandelbrot.png" width="336">
 
 ### Zero-player breakout game
 ![](https://raw.githubusercontent.com/ssloy/ssloy.github.io/main/docs/tinycompiler/gfx/breakout.gif)
 
 ### Fire
 ![](https://raw.githubusercontent.com/ssloy/ssloy.github.io/main/docs/tinycompiler/gfx/fire6.gif)
+
+### Sunset race
+![](https://raw.githubusercontent.com/ssloy/ssloy.github.io/main/docs/tinycompiler/gfx/sunset-race.gif)
+
+### Metaballs
+![](https://raw.githubusercontent.com/ssloy/ssloy.github.io/main/docs/tinycompiler/gfx/metaballs.gif)
+
+
+

test-programs/simple/eight-queens.wend

@@ -14,23 +14,23 @@ main() {
     bool valid_position(int row, int col) { // Is it safe to plase a queen in this position?
         int r; int c;                       // The board is filled left-to-right (it contains col-1 queens),
         c = 0;                              // so we need to check to the left of row,col position.
-        while c<col {                       // Moreover, no need to check col column.
-            if board(c+row*8) {
+        while c<col {
+            if board(c+row*8) { // Check current row (no need to check col column).
                 return false;
             }
             c = c + 1;
         }
         r = row; c = col;
         while c>=0 && r>=0 {
-            if board(c+r*8) {
+            if board(c+r*8) {  // Check the diagonal.
                 return false;
             }
             r = r - 1;
             c = c - 1;
         }
         r = row; c = col;
         while r<8 && c>=0 {
-            if board(c+r*8) {
+            if board(c+r*8) {  // Check the anti-diagonal.
                 return false;
             }
             r = r + 1;