
    <div id="second-sticky" class="sticky"></div> <!-- 100w x 100h -->

    <div class="vertical-spacer"></div> <!-- 100w x 200h -->

  </div>


  <div id="third-scrolling-container" class="scrolling-container">  <!-- 150w x 250h viewport -->

    <div class="vertical-spacer"></div> <!-- 100w x 200h -->

    <div id="third-sticky" class="sticky"></div> <!-- 100w x 100h -->

    <div class="vertical-spacer"></div> <!-- 100w x 200h -->

  </div>
