Ring ring2 = new Ring((hue + hue_delta * 1) % 360, radius2, girth);
Ring ring3 = new Ring((hue + hue_delta * 2) % 360, radius3, girth);
Ring ring2 = new Ring((hue + hue_delta * 1) % 360, radius2, girth);
Ring ring3 = new Ring((hue + hue_delta * 2) % 360, radius3, girth);