c = circle(r=50) show(c) c1=ellipse(x=0,y=0,w=200,h=100,fill="lightblue")+ellipse(x=0,y=0,w=100,h=200,fill="lightblue") show(c1) c2=circle(x=50,y=0,r=25,fill="yellow")+circle(x=0,y=50,r=25,fill="yellow")+circle(x=-50,y=0,r=25,fill="yellow")+circle(x=0,y=-50,r=25,fill="yellow") show(c2) r=circle(r=25,fill="red") show(r)