Hello, I am John. I love electronics and am able to build circuits from a schematic. However I am disabled with limited cognitive ability and unable to understand most electronic theory. My 19 year old son Chris was in a horrible car crash in January and suffered very severe traumatic brain injury, he can only move his right hand a little but does squeeze my finger for a yes to questions. I am trying to figure out how to make a switch for his right hand that will light a different color LED each time the switch makes contact, so that maybe green comes on first and equals YES. Then maybe red next squeezze for NO. And so on,blue,yellow,white,orange, whatever I can figure out and train him to do. I am not good at explaining things and usually stay out of things because of that, but I want to try and make something to help my boy.The simpler the better. Any help from those with the knowledge to figure out such a circuit would be more than appreciated. All I can do is barely figure out a squeeze switch that can sense a very small, light pulse from one of any of the fingers. I can not do any PICs. Thanks for the time.