Arrch:
So you need to connect 4 pins per segment to the Arduino and send the binary code to those four pins. The simple way to do it would be to use digitalWrite() individually. Another (better in my opinion) way would be to use port manipulation. But I don't see how you think that code can drive the LEDs when nowhere in that sketch do you specify what pins the decoders are hooked up to.
Okay, thanks. I am looking into that as we speak. How do you go about finding the correct pin number?