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<!DOCTYPE html>
<head>
<title>CSS Reference File</title>
<style type="text/css">
.container {
position: absolute;
height: 200px;
width: 100px;
background-color:green;
margin-top: 150px;
}
</style>
</head>
<body>
<p>You should see only 1 green area.</p>
<div class="container">
</div>
</body>
</html>