<!DOCTYPE html>
<html>
<head>
<title>CSS Reference File</title>
</head>
<style>
#green-square {
position: absolute;
left: 25px;
top: 50px;
width: 200px;
height: 200px;
background-color: green;
color: green;
}
</style>
<body>
<p>The test passes if there is a green square and no red.</p>
<div id="green-square"></div>
</body>
</html>