    mask-image: url(#mask1), url(#mask2);
        box-shadow: 0 0 0 100px purple;
        width: 100px;
        height: 100px;
        position: relative;
        left: 100px;
        top: 100px;
      }
    </style>
  </head>
  <body>
    <div></div>
  </body>
</html>
