I know it's an old game, but I am trying to get all the way through it. I'm talking about Sierra's Incredible Machine 3.0. I'm stuck on the Really Hard puzzles, #13, LaserMania. The object is to mix certain laser colors to turn on an electric can opener. Due to a little color blindness, I'm having much trouble with this one. I've played around with it for about two weeks now, and I just can't figure it out. Could someone please give me a hint on how to finish this one level?