#canvas{
  background-color:yellow;
  width: 88vmin;
  height: 90vmin;
  margin: 0 auto;
  position: relative;
}

#first{
  position: absolute;
  background-color:gold;
  left: 10vmin;
  top: 15vmin;
  width: 68vmin;
  height:  64vmin;
}


#second{
  position: absolute;
  background-color:orange;
  left: 20vmin;
  top: 31vmin;
  width: 48vmin;
  height:  37vmin;
}