wired back to the Arduino. For the software, [Will] is using a floating analog pin as a source of random noise, and from there comes up with how often each LED will blink on and off, and for how long.

It is a pretty common first project to use an Arduino (or similar) to blink an LED. Which, of course, brings taunts of: you could have used a 555! You can, of course, also use any sort of ...

Now you are ready to upload a "sketch" (small user program). Try modifying the Basic Blink example ... of an LED you wire up to "pin 11". How it changes brightness is up to you but it should be hands ...

Launch the Raspberry Pi terminal. If all goes well, youll spot the Done uploading message in the Console output, and the Arduino will start blinking the LED every second. With that, youre free to ...