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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Basic User Interface Reference File</title>
<style>
#parent {
border: 4px dotted blue;
height: 150px;
margin: 26px;
width: 150px;
}
#child {
border: 4px dotted green;
height: 110px;
margin: 16px;
width: 110px;
}
</style>
<body>
<p>Test passes if there is a blank square with <strong>a green dotted</strong> border centered inside a blue dotted border.</p>
<div id="parent">
<div id="child"></div>
</div>
</body>