#canvas{
  width: 100vmin;
  margin:17vmin auto 3vmin auto;
  height: 50vmin;
  background-color: antiquewhite;
  position: relative;
}

#red{
  left:0%;
  top:0%;
  width: 100%;
  height: 100%;
  background-color: rgb(175, 1, 38);
  position: absolute;
}

#black{
  right:0%;
  top:0%;
  width:84%;
  height: 40%;
  background-color:rgb(29, 27, 30);
  position: absolute;
}