;

    requestAnimationFrame(animateCircles);
  }

  animateCircles();
});

</script>

<div id="progressBar"></div>
<script>
  window.onscroll = function () {
    var winScroll =
      document.body.scrollTop || document.documentElement.scrollTop;
    var height =
      document.documentElement.scrollHeight -
      document.documentElement.clientHeight;
    var scrolled = (winScroll / height) * 100;
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</script>
    <div class="prelo