Beginning the gamification

Separated the main loop into stages. A function call for each stage.
There may be a better way to do this, with function pointers possibly,
but this implementation seems to work for testing.

Stages (After welcome/opening sequence):
1. Mimicry: Tap along to the flashing LED
2. Fib: Tap the Fib sequence

Both are unfinished, but the transfer between stages is there.
Commenting old code out