<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>CSS Masking: clip-path: clip path geometry box</title>
    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
  </head>
  <body>
    <svg width="200" height="200" style="position: absolute; left: 0px; top: 0px;">
      <polygon points="100,50 150,100 150,150 50,150 50,100" fill="blue"/>
    </svg>
  </body>
</html>
