I have not used Nick's code but have posted sample code for font scrolling here Scrolling matrix display - #9 by Riva - LEDs and Multiplexing - Arduino Forum and this is the final product the above test code was used in Arduino WordClock - #5 by Riva - Exhibition / Gallery - Arduino Forum sorry the video from my phone is a bit poor but it will give you an idea how it looks. FYI the video was taken before I added kerning data to the font characters so does not look quite how the code works now.