Added a score and question number reset after answering five questions.

main.py

@@ -112,14 +112,18 @@ class QuizzerApp(App):
         question = self.questions[-1] if len(self.questions) > 0 else QuizzerApp.DEFAULT_QUESTION
         self.paused = True
         self.correct = answer == question[2]
+        if self.correct == True:
+            self.score+=100
+        self.num_answered += 1
         Clock.schedule_once(lambda delta: self.unpause(), PAUSE_TIME)
+        if self.num_answered%5 == 0:
+            self.score = 0
+            self.num_answered =0
 
 
     def unpause(self):
         self.paused = False
-        if self.correct == True:
-            app.score+=100
-        self.num_answered += 1
+        #self.num_answered += 1
         if len(self.questions) > 0:
             self.questions.pop()
         if len(self.questions) == 0: