#canvas{
  position:relative;
  height:80vmin;
  width:80vmin;
  Background-color:#556;
  margin: 0 auto;
}
#col2{
  top:0vmin;
  left:27vmin;
  position:absolute;
  background-color: indianred;
  height:80vmin;
  width:27vmin;
}
#col1{
  top:0vmin;
  left: 53vmin;
  position:absolute;
  background-color: darkgoldenrod;
  height:80vmin;
  width:27vmin;
}