 
   constructor: ->
     @value = 0
-    @steps = [0, 70, 50, 15]
+    @tracks = [0, 70, 50, 15]
     @maxSteps = 100
     @colors = [255, 255, 255]
     @inPorts = new noflo.InPorts

            continue
          ledColors.push @step step
        colors.push ledColors
        @steps[idx]++
        if @steps[idx] > @maxSteps
          @steps[idx] = 0

      @outPorts.colors.send colors
    @inPorts.step.on 'disconnect', =>
      @outPorts.colors.disconnect()

    @inPorts.colors.on 'data', (@colors) =>
    @inPorts.step.on 'data', =>
      colors = []
      for step, idx in @tracks
        ledColors = []
        for color in @colors
          unless color
