Changes

* Working in pairs, set up six or more digital LED outputs. Set these up as a dot matrix display (say 2 X 3 or 3 X 2 or 3 X 3) rather than in a line. Technically you have 13 digital outputs to work with (4 X 3 dot matrix?).

* The code and hardware here are the same as driving a single LED, or multiple LEDs in a line. What you are changing is the spatial configuration of the LEDs. Having them arrayed in a box reads differently than having them in a line--now they are "pixels" instead of single lights.

== Homework ==