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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Basic User Interface Reference File</title>
<style>
#cb {
position: absolute;
width: 100px;
height: 100px;
}
#test {
margin-right: 5px;
margin-top: 25px;
margin-left: 25px;
width: 70px;
height: 70px;
background:green;
}
</style>
<body>
<p>Test passes if there is a <strong>filled green square</strong> and <strong>no red</strong>.</p>
<div id="cb">
<div id="test"></div>
</div>
</body>