<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<style>
div {
  width: 100px;
  height: 100px;
  background-color: green;
}
</style>
</head>
<body>
<div></div>
</body>
</html>