the code behind http://www.youtube.com/watch?v=Z2eyb_pqH0E

gistfile1.py

import sys

from birdfish.input.osc import OSCDispatcher
from birdfish.lights import RGBLight, Chase, LightShow
from birdfish.output.lumos_network import LumosNetwork

from birdfish import tween

osc_dispatcher = OSCDispatcher(('0.0.0.0', 8998))

# create a light show - manages the updating of all lights
show = LightShow()

# Create a network - in this case, universe 3
dmx3 = LumosNetwork(3)

# add the network to the show
show.networks.append(dmx3)


class ColorTriggerChase(Chase):
    def __init__(self, *args, **kwargs):
        super(ColorTriggerChase, self).__init__(*args, **kwargs)
        self.target_hue = 0

    def render(self):
        """
        This is mostly copy and paste from the Chase render method
        but it changes the hue of those elements being triggered
        """
        if self.last_center is None:
            self.last_center = self.start_pos
        current_center = int(self.center_position)
        if self.sweep:
            if self.last_center > current_center:
                trigger_elements = self.elements[current_center:self.last_center]
            else:
                trigger_elements = self.elements[self.last_center:current_center]

            for e in trigger_elements:
                e.hue = self.target_hue
                e.trigger(self.trigger_intensity)
        self.last_center = current_center

simple = ColorTriggerChase(name="simplechase")

elementid = 0
for i in range(1, 360, 3):
    elementid += 1
    l = RGBLight(
            start_channel=i,
            name="item_%s" % elementid,
            attack_duration=0.2,
            decay_duration=0,
            release_duration=1,
            release_shape=tween.OUT_CIRC,
            sustain_value=1,
            )
    l.saturation = 1
    l.bell_mode = True
    dmx3.add_element(l)
    simple.elements.append(l)


simple.start_pos = 12
simple.speed = .1
simple.moveto = simple.end_pos = 65

show.add_element(simple)

osc_dispatcher.add_trigger('/3/toggle1', simple)
osc_dispatcher.add_map('/3/xy', simple, 'target_hue', data_member=1)
osc_dispatcher.add_map('/3/xy', simple, 'move_toward', out_range=(12, 65))

osc_dispatcher.start()

# start the show in a try block so that we can catch ^C and stop the input threads
if __name__ == '__main__':
    try:
        show.run_live()
    except KeyboardInterrupt:
        # cleanup
        osc_dispatcher.stop()
        sys.exit(0)