Thanks Serg here is a further "tinked" version
xtree1.mov
xtree1.zip
sound file not included
download
http://www.freesound.org/people/milton./downloaded_sounds/
flicker.mov
flicker.zip
in chor set light intensity with expression intensity If(Rand()
neon sign using expression for glow to turn glow on or off 1=on 0 = off
flickering.mov
neonflicker.zip