#canvas{
  background-color: rgb(37,98,186);
 width: 60vmin;
 height: 60vmin;
 margin: 20vmin auto 0 auto;
  position: relative;
}



#secondring{
  position: absolute;
  left: 7.5vmin;
  top: 10vmin;
  width: 45vmin;
  height: 45vmin;
  background-color: rgb(34,88, 127); 
  
}
 

#innerring{
  position: absolute;
  left:20vmin;
  top: 30vmin;
  width:20vmin;
  height:20vmin;
  background-color: rgb(42,100,88)
  
  
  
}