#w1{
      z-index: 2;
      position: absolute;
      background-color: black;
      top: 220px;
      left:170px;
      width: 20px;
      height: 60px;
    }
    #w2{
      z-index: 2;
      position: absolute;
      background-color: black;
      top: 220px;
      left:200px;
      width: 20px;
      height: 60px;
    }
    #w3{
      z-index: 2;
      position: absolute;
      background-color: black;
      top: 220px;
      left:230px;
      width: 20px;
      height: 60px;
    }
    #w4{
      z-index: 2;
      position: absolute;
      background-color: black;
      top: 260px;
      left:170px;
      width: 80px;
      height: 20px;
    }