diff --git a/examples/test_include/anarcho.ptx b/examples/test_include/anarcho.ptx
new file mode 100644
index 0000000..fd72efb
--- /dev/null
+++ b/examples/test_include/anarcho.ptx
@@ -0,0 +1,2 @@
+stuff = 'Anarcho'
+print stuff
diff --git a/examples/test_include/body.rpy b/examples/test_include/body.rpy
deleted file mode 100644
index 553fa3e..0000000
--- a/examples/test_include/body.rpy
+++ /dev/null
@@ -1,16 +0,0 @@
-# The game starts here.
-label start:
-
-    # Start by playing some music.
-    play music "illurock.opus"
-
-    scene bg lecturehall
-    with fade
-
-    "It's only when I hear the sounds of shuffling feet and supplies being put away that I realize that the lecture's over."
-
-    "Professor Eileen's lectures are usually interesting, but today I just couldn't concentrate on it."
-
-    "I've had a lot of other thoughts on my mind...thoughts that culminate in a question."
-
-    "It's a question that I've been meaning to ask a certain someone."
\ No newline at end of file
diff --git a/examples/test_include/header.rpy b/examples/test_include/header.rpy
deleted file mode 100644
index 8b03abc..0000000
--- a/examples/test_include/header.rpy
+++ /dev/null
@@ -1,7 +0,0 @@
-# Declare characters used by this game.
-define s = Character(_("Sylvie"), color="#c8ffc8")
-define m = Character(_("Me"), color="#c8c8ff")
-
-# This is a variable that is True if you've compared a VN to a book, and False
-# otherwise.
-default book = False
\ No newline at end of file
diff --git a/examples/test_include/taoism.ptx b/examples/test_include/taoism.ptx
new file mode 100644
index 0000000..08b6ede
--- /dev/null
+++ b/examples/test_include/taoism.ptx
@@ -0,0 +1,3 @@
+include 'anarcho.ptx'
+stuff = 'Taoism'
+print stuff
diff --git a/examples/test_include/test.ptx b/examples/test_include/test.ptx
index 728ecc2..97b94bb 100644
--- a/examples/test_include/test.ptx
+++ b/examples/test_include/test.ptx
@@ -1,4 +1,4 @@
 # Testing 'include' macro
 
-include 'header.rpy'
-include 'body.rpy'
+include 'anarcho.ptx'
+include 'taoism.ptx'
diff --git a/pytux/build/lexa.py b/pytux/build/lexa.py
index 9fef050..69551d0 100644
--- a/pytux/build/lexa.py
+++ b/pytux/build/lexa.py
@@ -44,7 +44,7 @@ def t_STRING(t):
 def t_NEWLINE(t):
     r'\n+'
     t.lexer.lineno += len(t.value)
-    t.value = '\n' * (len(t.value) + 1)
+    t.value = '\n'
     return t
 
 
diff --git a/pytux/build/quiz.py b/pytux/build/quiz.py
index 615efe1..8f0dd28 100644
--- a/pytux/build/quiz.py
+++ b/pytux/build/quiz.py
@@ -22,22 +22,22 @@ def __init__(self, question, lineno):
         self.__lineno = lineno
         Quiz.__counter += 1
 
-    """
-    Add answer to quiz.
-    
-    :param marker: '+' if answer is correct, '-' if answer is incorrect
-    :param text: text of the answer 
-    """
     def add_answer(self, marker, text):
+        """
+        Add answer to quiz.
+
+        :param marker: '+' if answer is correct, '-' if answer is incorrect
+        :param text: text of the answer
+        """
         self.__answers.append({'marker': marker, 'text': text})
 
-    """
-    Quiz validation function: when there is more than one correct answer or no correct answers, or 
-    there is no incorrect answers, than some error will be raised.
-    
-    :return: None.
-    """
     def __validate_quiz(self):
+        """
+        Quiz validation function: when there is more than one correct answer or no correct answers, or
+        there is no incorrect answers, than some error will be raised.
+
+        :return: None.
+        """
         n_correct = 0
         n_incorrect = 0
         for answer in self.__answers:
@@ -51,19 +51,19 @@ def __validate_quiz(self):
         if n_incorrect == 0:
             raise QuizError(f"There must be at least one answer marked with - in quiz on line {self.__lineno}")
 
-    """
-    Quiz generation.
-    
-    :return: Ren'Py code for quiz.
-    """
     def generate_quiz(self):
+        """
+        Quiz generation.
+
+        :return: Ren'Py code for quiz.
+        """
         # Checking answers and shuffling them randomly
         self.__validate_quiz()
         shuffle(self.__answers)
 
         result = ''
-        result += f"menu quiz_{self.__counter}:\n"          # Ren'Py menu statement
-        result += f"{Quiz.TAB}\"{self.__question}\"\n\n"    # question is placed right after
+        result += f"menu quiz_{self.__counter}:\n"  # Ren'Py menu statement
+        result += f"{Quiz.TAB}\"{self.__question}\"\n\n"  # question is placed right after
         for answer in self.__answers:
             result += f"{Quiz.TAB}\"{answer['text']}\":\n"
             if answer['marker'] == '+':
diff --git a/pytux/build/semen.py b/pytux/build/semen.py
index 34e4081..197dfea 100644
--- a/pytux/build/semen.py
+++ b/pytux/build/semen.py
@@ -11,6 +11,23 @@ def __str__(self):
 
 
 parsed_file_dir = ''
+dependencies_stack = []
+
+
+def process_dependencies(file_path):
+    """
+    Process file dependencies.
+
+    :param file_path: file relative path
+    :return: None.
+    """
+    if file_path in dependencies_stack:
+        dependencies = ""
+        for name in dependencies_stack:
+            dependencies += f"{name} -> "
+        dependencies += file_path
+        raise SemenError(f"Recursive include: {dependencies}")
+    dependencies_stack.append(file_path)
 
 
 # Program
@@ -27,7 +44,11 @@ def p_program(p):
 def p_include_string(p):
     'sentence : INCLUDE STRING NEWLINE'
     with open(path.join(parsed_file_dir, p[2]), "r") as include_file:
-        p[0] = include_file.read() + p[3]
+        data = include_file.read()
+    process_dependencies(p[2])
+    result = Semen.parse(data, lexer=Lexa.clone())
+    dependencies_stack.pop()
+    p[0] = result
 
 
 # Variable initialization or assignment sentence
@@ -40,7 +61,7 @@ def p_assign_string_variable(p):
 # Print variable sentence
 def p_print(p):
     'sentence : PRINT VARNAME NEWLINE'
-    p[0] = Varya.get_value(p[2]) + '\n'
+    p[0] = Varya.get_value(p[2]) + p[3]
 
 
 # Quiz sentence
@@ -113,7 +134,14 @@ def p_error(p):
 
 
 def parse(file):
+    """
+    Parses file, collects some important metainformation.
+
+    :param file: source file (S)
+    :return: result (R) of parsing.
+    """
     global parsed_file_dir
     parsed_file_dir = path.dirname(path.abspath(file.name))
+    dependencies_stack.append(file.name)
     data = file.read()
     return Semen.parse(data)
diff --git a/pytux/build/varya.py b/pytux/build/varya.py
index 59cdff1..61dc5a2 100644
--- a/pytux/build/varya.py
+++ b/pytux/build/varya.py
@@ -12,44 +12,44 @@ class VarSystem:
 
     __variables = {}
 
-    """
-    Initializes variable or assigns value to existing variable.
-
-    :param name: variable identifier 
-    :param value: variable value
-    :param type: variable type
-    :return: None.
-    """
     def init_or_assign(self, name: str, value, type: VarType):
+        """
+        Initializes variable or assigns value to existing variable.
+
+        :param name: variable identifier
+        :param value: variable value
+        :param type: variable type
+        :return: None.
+        """
         if name in self.__variables:
             var_type = self.__variables[name][1]
             if var_type != type:
                 raise ValueError(f"trying to assign value of type {type} to the variable {name} of type {var_type}")
         self.__variables[name] = (value, type)
 
-    """
-    Gets variable value if variable with such identifier exists.
-    
-    :param name: variable identifier 
-    :return: variable value.
-    """
     def get_value(self, name: str):
+        """
+        Gets variable value if variable with such identifier exists.
+
+        :param name: variable identifier
+        :return: variable value.
+        """
         if name in self.__variables:
             return self.__variables[name][0]
         else:
             return None
 
-    """
-    Gets variable type if variable with such identifier exists.
-
-    :param name: variable identifier 
-    :return: variable type.
-    """
     def get_type(self, name: str):
+        """
+        Gets variable type if variable with such identifier exists.
+
+        :param name: variable identifier
+        :return: variable type.
+        """
         if name in self.__variables:
             return self.__variables[name][1]
         else:
             return None
 
 
-Varya = VarSystem()
\ No newline at end of file
+Varya = VarSystem()