#canvas{
  width: 75vmin;
  height: 100vmin;
  margin: 20vmin auto;
  position: relative;  
  background-color: rgb(221, 216, 212);
}

#background{
  width: 30vmin;
  height: 100vmin;
  left: 0vmin;
  top: 0vmin;
  position: absolute;
  background-color: rgb(43, 44, 45)
}

#left{
  width: 7vmin;
  height: 50vmin;
  left: 14vmin;
  top: 13vmin; 
  position: absolute;  
  background-color: rgb(221, 216, 212);
}

#greybox{
  width: 9vmin;
  height: 45vmin;
  left: 21vmin;
  top: 55vmin;
  position: absolute;
  background-color: rgb(184, 184, 184);
}