<style type="text/css">
  body { background-color: #aaaaaa; }
  div {
    background-color: white; border: 2px solid black; padding: 10px;
  }

  #pos {
    position: absolute;
    left: 50px;
    top: 50px;
  }

  #pos2 {
    top: 160px;
    left: 75px;
    bottom: 75px;
    right: 100px;
    position: absolute;
    overflow: hidden;
  }

  #pos3 {
    position: absolute;
    width: 50%;
    height: 50%;
    bottom: 0px;
    right: 0px;
  }
</style>
