<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Verify that animations properly start (reference)</title>
    <style>
      #container {
        position: absolute;
        left: 0;
        top: 3em;
      }
      #coveringRect {
        background: blue;
        position: absolute;
        top: -10px;
        left: 90px;
        width: 5000px;
        height: 500px;
      }
    </style>
  </head>
  <body>
    <p>This test passes if green squares are moved behind the blue rectangle.</p>
    <div id="container">
      <div id="coveringRect"></div>
    </div>
  </body>
</html>