<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>立方体</title>
<link rel="stylesheet" type="text/css" href="css/demo.css"/>
</head>
<body>
<div id="box">
<div id="box1">
<div id="front">前</div>
<div id="back">后</div>
<div id="top">上</div>
<div id="bottom">下</div>
<div id="left">左</div>
<div id="right">右</div>
<i id="i-front"></i>
<i id="i-back"></i>
<i id="i-top"></i>
<i id="i-bottom"></i>
<i id="i-left"></i>
<i id="i-right"></i>
</div>
</div>
</body>
</html>
