Untitled

<!DOCTYPE html>
<html>
<head>

<title>Lesson 3 </title>
<meta charset ="utf-8">
<style>
header {
	background-color:#ccffcc;
	text-align: center;
	line-height:30px;
}

h1{line-height: 50px;}

article {
	background-color:#ccccff;
	width: 200px;
	height: 400px;
	float: left;
}

aside {
	background-color:#ffcccc;
	width: 200px;
	height: 400px;
	float: right;
}

div  {
	width: 200px;
	height: 400px;
	background-color:#996633;
	float: left;
	clear: left;
}
</style>
</head>
<body>
<header>
	<h1>Lesson 3</h1>
</header>

<article>
</article>

<aside>
</aside>

<div>
</div>

</body>


</html>