中文说明：这是一个简单的贪吃蛇游戏，众所周知，很多人小时候都玩过这款游戏，当学过编程之后，就有自己设计一个的想法，所以上传这个m文件，供大家借阅。
English Description：
This is a simple snake game, as we all know, a lot of people have played the game as a child, after learning the programming, we have design ideas, so uploading this m-file for everyone to borrow.