css/css-masking/mask-image/mask-image-3-ref.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>CSS Masking: mask-image: multiple SVG masks</title>
    <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com">
    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
  </head>
  <body>
    <br>
    <svg width="100" height="100">
      <rect x="0" y="0" width="50" height="50" fill="purple"/>
      <circle cx="50" cy="50" r="25" fill="purple"/>
    </svg>
  </body>
</html>