    a3,2 0 0,0 #{2*scale},0 
    a3,2 0 0,0 #{-2*scale},0 
    z m#{-3.5*scale},0"
-   
-draw_eyes = (scale) ->
-  "m#{3.3*scale},0.3
-   a3,2 0 1,0 #{-0.4*scale},0
-   a3,2 0 1,0 #{0.4*scale},0
-   z "
 
 draw_shell = (scale) ->
   "m#{-3*scale},0 a3,2 0 1,0 #{6*scale},0 
-   m0,0           a3,2 0 1,0 #{-6*scale},0z
-  "
+   m0,0           a3,2 0 1,0 #{-6*scale},0z"
 
 exports.turtles = {
   _LABEL: "turtles"

    value
  path: (world, args) -> 
    scale = world.get('scale') / 10
    [
      draw_legs(scale) + draw_face(scale)# + draw_eyes(scale)
      draw_shell(scale)
    ]
  go: (world, args) ->
    split = world.get('split')
    {dir} = args

    assert dir, "expects dir"
    next_v_i =  dir * world.get('v_j')
    next_v_j = -1 * dir * world.get('v_i')
    world.put 'v_i', next_v_i
    world.put 'v_j', next_v_j
    
  program: ['front', 'right', 'front', 'left']
  program_counter: 0
  step: (world, args) ->
    program = world.get('program')
    counter = world.get('program_counter')
    signal = program[counter]
    action = world.get('signals')[signal]
    counter = counter + 1
    counter= 0 if counter >= program.length
    world.put('program_counter', counter)
