<!DOCTYPE html>
<html>
  <head>
    <title>CSS Reftest Reference</title>
    <link rel="author" title="Aryeh Gregor" href="mailto:ayg@aryeh.name">
  </head>
  <body>
    <div style="width: 100px; height: 100px">
      <div style="background: blue; width: 50px; height: 50px;"></div>
      <div style="background: lime; width: 50px; height: 50px; margin-left: 50px;"></div>
    </div>
  </body>
</html>