<html>
<head></head>
<body>
<div style="width:400px; height:150px; background-color:gray;color:white;font-size:20px" >hello world!
<div style="width:300px;height;50px;background-color:yellow;color:blue;font-size:20px;margin-left:50px;margin-top:25px">hello world!</div>
</div>
</body>
</html>
