body	{ background-color: #000000; color: #FFFFFF;}
  div.game {
  width: 350px;
  height: 140px;
  margin: 10px;
  position: relative;
  background-color: #000080;
}

div.tower {
  width: 100px;
  position: absolute;
  bottom: 10px;
  background-color: #0000f0;
  }
  
#t1 {left:10px}
#t2 {left:120px}
#t3 {left:230px}

div.disk, div.bottom{
  text-align: center;
}