Created constant for the number of quiz questions. In unpause method, added...

Created constant for the number of quiz questions. In unpause method, added statement to reset score and progress after the number of questions.

main.py

 from random import shuffle
-
 from kivy.app import App
 from kivy.clock import Clock
 from kivy.properties import BooleanProperty, ListProperty
 from kivy.modules import inspector
 from kivy.core.window import Window
 from kivy.properties import NumericProperty
+from time import sleep
 
 
 GUI_QUESTIONS = [
@@ -63,6 +63,7 @@ TREE_QUESTIONS = [
 
 
 PAUSE_TIME = 0.75  # seconds
+QUESTIONS_QUIZ = 5 # Number of quiz questions
 
 
 class QuizzerApp(App):
@@ -101,7 +102,11 @@ class QuizzerApp(App):
         self.number_questions += 1
         Clock.schedule_once(lambda delta: self.unpause(), PAUSE_TIME)
 
+
     def unpause(self):
+        if self.number_questions > QUESTIONS_QUIZ - 1:
+            self.number_questions = 0
+            self.score = 0
         self.paused = False
         if len(self.questions) > 0:
             self.questions.pop()