Code
c=circle(x=50,y=0,r=50,fill="yellow")
show(c)
c=circle(x=-50,y=0,r=50,fill="yellow")
show(c)
c=circle(x=0,y=50,r=50,fill="yellow")
show (c)
c=circle(x=0,y=-50,r=50,fill="yellow")
show (c)
c1=circle(x=0,y=0,r=50,fill="green")
show (c1)
c1=circle(x=0,y=0,r=35,fill="yellow")
show (c1)
c1=circle(x=0,y=0,r=25,fill="green")
show (c1)
c1=circle(x=50,y=50,r=2,fill="green")
show(c1)
c1=circle(x=-50,y=50,r=2,fill="green")
show (c1)
c1=circle(x=50,y=-50,r=2,fill="green")
show(c1)
c1=circle(x=-50,y=-50,r=2,fill="green")
show(c1)