@noel great job
couple typos:
The pins were chosen for an Android mini pro
I supposed you meant an Arduino Pro Mini
in the fritzing drawing:
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it’s probably the Common Cathode that is connected to GND.
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just for clarity, the 3 resistors are red, red, brown so 220Ω
(on my screen they could be confused with red/red/violet 
which would be 220MΩ (20%) so way too much)…