the LED board can control the RGB value of some LEDs and can also control patterns.
think of a standard street fighter II machine, all the buttons are clear. you highlight street fighter II in your game list and suddenly you have 2 red, 2 white and 2 blue buttons, you highlight final fight and you get a 2 buttons lit up, a red and a white....
thats the basic idea each button can be lit or off and when its lit can be any color you want. The other thing is just to supply the proper voltage to the LEDs