Step 3: Code the 'Duino and Computer.
I explained this in more detail in My Twittering coffee pot instructable, check that one out if you're having trouble
Python is mad fresh, Here's the code for that. Just run in a terminal on your Computer:
The Python using the Python-Twitter Library searches recent tweets with #mustache and then gives a signal to serial to interact with the arduino. While this code is running your arduino along with mustache module should be connected.
The arduino code is here, to be uploaded to your arduino:
Once all that is done, you should feel the tweets pour in.