auto save

snake.py

@@ -20,6 +20,8 @@ while True:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
+        if event.type==locals.KEYDOWN:
+            if event.key=locals.K_    
     x+=30
     position.append((x,y))
     position.pop(0)