     @inPorts.canvas.on 'data', (data) =>
       @canvas = data
 
-  shutdown: =>
+  shutdown: ->
     # ???
 
   parseThing: (thing) ->

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

    @ctx.beginPath()
    @ctx.lineTo @turtle.x, @turtle.y

  back: (distance) ->
    # TODO

  left: (angle) =>
