auto save

snake.py

@@ -21,8 +21,6 @@ while True:
         if event.type == locals.QUIT:
                 # 收到退出事件后退出程序
                 exit()
-        if event.key == locals.KEYDOWN:
-            if event.key == 
         # 将背景图画上去
     screen.blit(background, (0, 0))
         # 将贪吃蛇画上去