   To see how it works, check out the video:  What this project
requires:  Parts and consumables One perf board (or strip board)
Nine bicoloured LEDs, common cathode Nine identical resistors,
in the 100-220 ohm range Six identical resistors, in the 10kohm
- 500kohm range One single pole, double throw switch A bunch of
header pins A bunch of electrical wire Clear sticky tape
Heatshrinks (optional)    Everything Arduino related can be
found at http://www.arduino.cc.  On with the build!  Step 1:
Wiring up the LED matrix       <p>that is one very well written
instructable. great detail and explenations :) excelent job and
very cool project!</p> <p>Sorry, i want to ask how to import
those library to the board?</p> <p>I'm making this for a science
project, and I've looked all over, but I can't find where to get
that size and thickness for the transparent acrylic sheet. Does
anyone know where I can get one?</p> <p>It's not necessary to
use the exact size and thickness I used in the instructable. In
fact, any clear,