c = circle(r=100, x=0, y=0, fill="Red", stroke="black") s = circle(r=75, x=0, y=0, fill="yellow", stroke="black") r = circle(r=50, x=0, y=0, fill="orange", stroke="black") t = circle(r=25, x=0, y=0, fill="violet", stroke="black") y = circle(r=10, x=0, y=0, fill="green", stroke="black") x = circle(r=5, x=0, y=0, fill="white", stroke="black") show(c,s,r,t,y,x)