
        background-color: yellow;
      }
      #box1 {
        left: 150px;
        top: 0px;
      }
      #box2 {
        left: 0px;
        top: 150px;
      }
      .space {
        width: 500%;
        height: 500%;
        position: absolute;
      }
    </style>
    <div class="scroller" id="scroller">
        <div tabindex="1" id="box1" class="target">Box 1</div>
        <div tabindex="1" id="box2" class="target">Box 2</div>
      <div class="space"></div>
    </div>
  </body>

</html>
