save project

snake.py

@@ -63,7 +63,7 @@ while True:
     else:      
         position.pop(0)
     if x <0 or x >630 or y < 0 or y > 450:
-        exit(    
+        exit(    )
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去