8x8 LED Matrix sketch

I built a LED display out of 3 8x8 single color LED matrices. its wired to the arduino mega with 4 shift registers (595's) and i need help writing code to make it scroll messages.

I am new to writing C the hardware was the easy part now I'm stuck with the software, any help is greatly appreciated.

This is the schematic to what i have wired up... this is for an RGB display but i have it wired up to 3 matrices instead.


I'll post you my code later when I get home from work.

Code posted :)