just make a normal 1 byte register then add 1 to it and plug it back into the register, make sure the register is triggered by a clock rise or it would increase every tick
you need a d-flip-flop, plug its output into a not and its output into it self data, for a clock its input pin, place another , it's input is the output of it's not and the last d-flip-flops not as a clock, repeat this 8 times for a byte, the first input is its selfs not and a input pin
, place another , it's input is the output of it's not and the last d-flip-flops not as a clock, repeat this 8 times for a byte, the first input is its selfs not and a input pin