procedure 0
  draw
  pen colour = black
  dot 5
  pen colour = random
  dot 4
  move
#display: x=0, y=0, grid=32

procedure 1
  repeat 30 times
    paint 0
    right 90
    forward 5
    left 90
#display: x=-179, y=-21, grid=7

procedure 2
  paint 1
  right 90
  paint 1
  right 90
  paint 1
  right 90
  paint 1
  left 270
#display: x=-222, y=-329, grid=4