I'm trying to build a character (I'm in the development stage) that has a exposed heart on his chest. I want it to light up and beat with sound. I'm willing to settle with just a light-up heart, but I don't want it to be color changing. I was thinking as a last resort I could get the color changing one for $9.99 at Spirit Halloween and replace the multi color light with a single red or clear LED. As I was writing, I just now got an idea. I could replace the lights with alternating wight and red to give an impression of a beating heart. Would that work, or does anyone know of a better idea?