def setup ():
 size (500, 500)
 smooth ()
 background (255)
 strokeWeight (30)
 noLoop ()
def draw ():
 for i in range(8):
  stroke (20*i)
  line(i*50, 200, 150 + (i-1)*50, 300)
  line(i*50 + 100, 200, 50 + (i-1)*50, 300)
