很可爱的小游戏，启动程序梦回诺基亚时代~
代码如下↓
<html>
<head>
<meta charset="utf8">
<title>贪吃蛇游戏</title>
<!doctype html>
<html>
<body>
<canvas id="can" width="400" height="400" style="background:Black"></canvas>
<script>
var sn = [ 42, 41 ], dz = 43, fx = 1, n, ctx = document.getElementById(<