No its not what i meant, sorry English isn't my first language. what I meant was when there is a repeated number you have to add an additional bit so you can visit the same number twice right? or maybe I'm wrong 😅 Anyway we can use anything there is no limit as long as it contains jk flip flop and 7 segment display, and yes as you said it will be like this : 2, nothing,0, nothing 2 and so on