#canvas{
  position: relative;
  width: 80vmin;
  height: 80vmin;
  background-color: rgb(82,90,98);
  margin: 0 auto;

}

#col2{
  left: 27vmin;
  position: absolute;
 background-color: rgb(150,65,50); 
width: 27vmin;
height: 80vmin;
}

#col3{
  left: 53vmin;
  position: absolute;
  background-color: rgb(215,145,95);
  width: 27vmin;
  height: 80vmin;
  
}