im trying to build an led display board. its pretty simple, just a few led rows to create the characters. im using an Arduino board to control the leds, and using Processing to communicate. the idea is to develop an interface that someone could react with (something simple like a screen with buttons that correspond to letters), then the interface would send data to the arduino to tell it which leds to light up. unfortunately im not entirely sure how to do this. ive been told its possible. i was wondering if anyone could point me in the right direction.

im past that kind of stuff, im pretty familiar with the arduino, ive been using it for this entire year. but thanks for the response