Are the sad the ofa a

fddsfdsfdsfdsfdsdddddddddddd

That was quick

Why not ask your "friend"?

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the usual riddlingness of TMFKAA

Looks to be pretty well commented already.

Start by carefully reading the uC documentation of the its registers and their uses.
Heavy going to start with.
This gives a very simple overview (no the exact same AVR processor)

This link has the datasheet and other info for the UNO's ATmega328P