So I went on a tour of the CNN Building in Alanta a few weeks ago, and at the end you sit in this little theatre. In there they had several LED light fixtures that served several purposes. They were the house lights, and they were also used to color wash the screen. They consisted of 3 colors of LED's that you could mix and create any color of light from white to dark purple. My question for those of you good with the small electronics and LED's, how would I build and control a few of these fixtures?