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<!DOCTYPE html>
<html>
<head>
<style>
  #frameDiv {
    width: 400px;
    height: 170px;
    margin: 20px;
    position: relative;
    border: solid black 1px;
    background-color: rgb(205, 242, 205);
  }
  img {
    position: absolute;
    z-index: 1;
    width: 70px;
    offset: path('M 50 80 C 150 -20 250 180 350 80') 45deg;
    animation: moveImg 4s 1s 3;
  }
  svg {
    position: absolute;
    height: 100%;
    width: 100%;
    left: 0;
    top: 0;
  }
  @keyframes moveImg {
    100%  { offset-distance: 100%; }
  }
</style>
</head>
<body>
<h1>The offset property</h1>
<div id="frameDiv">
  <img src="img_fish.svg" alt="fish">
  <svg fill="none" stroke="gray" stroke-width="2" stroke-dasharray="5,5">