I'm allowed just to change R or S, or both but not D, Clck,Q and neg Q. After showing as first number 7, the one following must be 8 and then 9 and so on.
Mention that combinations are of 4 bits
This is the scheme i did:

 

What you have shown is a 4-bit binary asynchronous counter.
It will count from 0 to 15 and then recycle back to 0, and repeat.

 

How do you want to modify it? To what purpose?