procedure 0
  pen colour = red
  dot 1
  pen colour = black
  forward 2
  pen colour = red
  dot 1
  forward 2 with pen up
  pen colour = red
  dot 1
  pen colour = black
  forward 2
#display: x=21, y=28, grid=24

procedure 1
  repeat 8 times
    paint 0
    left 45
#display: x=50, y=-8, grid=14

