css/css-backgrounds/reference/background-attachment-fixed-block-002-ref.html

<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Reftest reference</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">

  <style>
  body
    {
      height: 50vh;
      margin: 0px;
    }

  div#filler-before
    {
      height: 100vh;
    }

  div#lime
    {
      background-color: lime;
      height: 25vh;
     }

  div#purple
    {
      background-color: purple;
      height: 25vh;
    }

  div#filler-after
    {
      height: 50vh;
    }
  </style>

  <body onload="window.scroll(0, document.body.offsetHeight);">

  <div id="filler-before"></div>

  <div id="lime"></div>

  <div id="purple"></div>

  <div id="filler-after"></div>