body{
  background-color: black;
}
#canvas{
  position: relative;
  background-color: rgb(67, 97, 180);
  margin:15vmin auto;
  width:40vmin;
  height:60vmin;

}
#greenbox{
  position:relative;
  background-color: rgb(45, 134, 73);
  left: 0vmin;
  top: 12.5vmin;
  width: 27.5vmin;
  height: 47.5vmin;
}
#redbox{
  position:relative;
  background-color: rgb(212, 81, 81);
  left:0vmin;
  bottom: 15vmin;
  width: 15vmin;
  height: 27.5vmin;
}