Chip’s Internal Timer in ’Normal' mode will count from 0 to 255, set the overflow flag TOV0 to 0 and count again from 0 to 255, set the flag to 0 and so on.
As usual, I used LED as output indicator on Port B0
We used 1024 for pre-scaler/divider value. Set the TCCR0B to 0000 0101
Note that we have to reset the overflow flag to 1 after timer count reached 255 (and set the flag to 0).
Oh, by the way, the register/variable/things that count from 0 to 255 is called TCNT0. We didn’t touch it in the code this time, maybe next.