<!DOCTYPE html>
<html>
  <meta charset="utf-8">
  <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
  <link rel="author" title="Mozilla" href="https://www.mozilla.org/">
  <link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#pagination">

  <style>
  .multicol {
    column-count: 2;
    column-gap: 0;
    column-fill: auto;
    width: 200px;
    border: 5px solid gray;
    height: 0px;
  }
  .flexbox {
    position: relative
  }
  .flexbox > div {
    position: absolute;
    width: 50px;
    contain: size;
  }
  </style>

  <div class="multicol">
    <div class="flexbox">
      <div style="height: 10px; background: pink; left: 100px;"></div>
      <div style="height: 20px; background: orange; left: 50px;"></div>
    </div>
  </div>
</html>
