<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<style>
.a1{ 350px;height:350px;border: 1px dashed black;padding: 27px;}
.a2{border:5px #d7effe solid ;padding:20px;}
.a3{background: crimson; padding: 41px; }
.a4{border: 1px white dashed;padding:3px}
.a5{border:1px white dashed;padding:49px}
.a6{100px;height: 100px;background: #96ff38;border: #fcff00 5px solid;}
</style>
<body>
<div class="a1">
<div class="a2">
<div class="a3">
<div class="a4">
<div class="a5">
<div class="a6"></div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>