#canvas{ 
position: relative;
width: 80vmin;
height: 80vmin;
background-color: #556;
margin: 0 auto;
}

#col2{
  top: 0;
  left: 27vmin;
  position: absolute;
  background-color: rgb(144,50,40);
  width: 27vmin;
  height: 80vmin;
  
  
  
  
}


#col3{
  top:0;
  left: 53vmin;
  position: absolute;
  background-color: coral;
  width: 27vmin;
  height: 80vmin




}