Step 1: Hardware and Software
1 Arduino Uno
1 USB Chord
Step 2: The Sketch
Once you have downloaded the software, open it up and start a new sketch. Next, click file, examples, digital, and blink without delay.
We are going to tweak this sketch a little. Go to the place where the sketch says "const int ledPin=13;" and change it to say "const int ledPin=12". That's it!