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<!DOCTYPE html>
<html>
<head>
<title>Reference File</title>
<link rel="author" title="CJ Gammon" href="mailto:youremail@address.com">
<style type="text/css">
#container{
position: relative;
}
.square{
position: absolute;
}
#green{
top: 50px;
left: 50px;
width: 100px;
height: 100px;
background: green;
}
</style>
</head>
<body>
<p>The test passes if there is a green square and no red or blue square.</p>
<div id="container">
<div id="green" class="square"></div>
</div>
</body>
</html>