setSpeed(fast)
setPenColor(white)
setBackground(black)
circle(200)
circle(190)
circle(180)
circle(170)
circle(160)
circle(150)
circle(140)
circle(130)
circle(120)
circle(110)
circle(100)
circle(90)
circle(80)
circle(70)
circle(60)
circle(50)
circle(40)
circle(30)
circle(20)
circle(10)
circle(0)