save project

snake.py

@@ -60,7 +60,8 @@ while True:
         score+=10
         score+=10
     else:
     else:
         position.pop(0)
         position.pop(0)
-    
+    if x < 0 or x >630 or y <  0 or y >450:
+        exit()
     screen.blit(background, (0, 0))
     screen.blit(background, (0, 0))
 
 
     screen.blit(snake_head, position[-1])
     screen.blit(snake_head, position[-1])