Rename variable 'init' to 'init_bit' and let the order be 2->1->0 instead of 1-> 2->0
Simplify logic for the 'init' variable related to minutes:
- rename to 'init_min' and make it an uint8_t
- cycle was 3 -> 2 -> 0 (not 3 -> 1 -> 0), turn this into 2 -> 1 -> 0
- simplify state switching in mainloop()