auto save

snake.py

@@ -16,8 +16,7 @@ body = pygame.image.load('body.png')
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
-            # 接收到退出事件后退出程序
-            exit()
+                 exit()
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去