#canvas{
  position: relative;
  width: 80vmin;
  height: 80vmin;
  background-color:rgb(82,88,95);
  margin: 0 auto;
}

#col2{
  top: 0;
  background-color:rgb(144,40,40);
  width:27vmin;
  height: 80vmin;
  margin-left:27vmin;
  
}

#col3{
  top:0;
  background-color: goldenrod;
  position: absolute;
  width:27vmin;
  height: 80vmin;
  margin-left:27vmin;
  
}