 90 0, c 10 40 20 20 -20 60, s -10 70 -40 -10");
    background-color: red;
    position: absolute;
  }
  #rect {
    width: 100px;
    height: 100px;
    background-color: green;
    clip-path: shape(nonzero from 10px 10px,
                     curve to 60px 20% via 40px 0,
                     smooth to 90px 0,
                     curve by -20px 60% via 10% 40px 20% 20px,
                     smooth by -40% -10px via -10px 70px);
  }
</style>
<body>
  <p>You should see no red.</p>
  <div id="ref"></div>
