To handle repetitions, there are two ways to solve that: → copy the step as often you need it → use the on-balance function, as the balance of x numbers in y lost spins will always be -x*y in comparison to the beginning of the block. (consider resetting the reference - usually in the first step
youroul.com is a universal roulette simulator, it is just impossible to describe every possible strategy concept. The elementary functions should be intuitive, just try it out! You can not break something and you even got some welcome credits.
If there are further questions please try to ask precisely for specific points, as it's much easier to imagine something than to describe it.
Bet x numbers, wait until these x numbers have not come y times. Then Flat bet until they come. Then restart all when they come.
Actually, there is no good reason to wait for any particular numbers. Only the frequencies within certain time periods might be interesting. In what figures exactly are you waiting for with your roulette strategy?