<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<style type="text/css">
.demo6{
height: 10px;
width: 10px;
background-color: #fff;
}
.demo5{
height: 10px;
width: 10px;
padding: 10px;
background-color: #0f0;
}
.demo4{
width: 30px;
height: 30px;
padding: 10px;
background-color: #fff;
}
.demo3{
height: 50px;
width: 50px;
padding: 10px;
background-color: #0f0;
}
.demo2{
height: 70px;
width: 70px;
padding: 10px;
background-color: #fff;
}
.demo1{
height: 90px;
width: 90px;
padding: 10px;
background-color: #0f0;
}
</style>
<title></title>
</head>
<body>
<div class="demo1">
<div class="demo2">
<div class="demo3">
<div class="demo4">
<div class="demo5">
<div class="demo6">
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
