#canvas{
  width: 62vmin;
  height: 80vmin;
  margin: 3vmin auto;
  position: relative;
  background-color: #4966b6;
}

#secondring{
  background-color: #4a8e41;
  width: 44vmin;
  height: 60vmin;
  bottom: 0vmin;
  position: absolute;
}

#innerring{
  background-color: #be513a;
  width: 22vmin;
  height: 30vmin;
  bottom: 0vmin;
  position: absolute;
}