Take one squid. Pin it down in a dish. Dissect out one of the peripheral nerves innervating the fin. Plug it into your iPod, and stimulate the nerve with the speaker output while playing Insane in the Membrane. Record the behavior of the chromatophores.
You have my permission, once I’m dead, to run any kind of patterned electrical signal through my nerves to see what my corpse will do. I don’t have the nice chromatophores, but maybe you could get some interesting twitches.