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<!DOCTYPE html>
<html>
<head>
<style>
  #frameDiv {
    width: 200px;
    height: 200px;
    margin: 20px;
    position: relative;
    border: solid black 1px;
    background-color: rgb(205, 242, 205);
  }
   #frameDiv > div {
    width: 50px;
    height: 50px;
    background-color: hotpink;
    offset-path: ray(45deg);
    animation: moveDiv 3s 3;
  }
  @keyframes moveDiv {
    100%  { offset-distance: 100%; }
  }
</style>
</head>
<body>
<h1>Animation along an offset-path with ray()</h1>
<div id="frameDiv">
  <div></div>
</div>
<p>The pink div is animated to follow a path defined with the ray() function.</p>
</body>
</html>