     @ctx.beginPath()
     @ctx.lineTo @turtle.x, @turtle.y
 
-  back: (distance) =>
+  back: (distance) ->
     # TODO
 
   left: (angle) =>

  constructor: ->
    # Default Mirobot's websocket URI
    @turtle =
      position =
        x: 0
        y: 0
      vector =
        x: 0
        y: 1
      angle: 90

    @inPorts.canvas.on 'data', (data) =>
      @canvas = data

  shutdown: ->
    # ???

  parseThing: (thing) ->
