01020102 counter

I want to design a counter with D flipflops
counter sequence is 01020202 and so on
how can I design this?

By building a simple counter and using regular logic circuits to fix it

It seems like an odd request is it college work?

Does it have to be synchronous or will a ripple counter do?

Do you have to drive a 7 segment display or is binary fine?

If it's binary use a two bit binary counter and logic gates to fix the output, as mentioned above.

Hint: It can be done with three NAND gates enabling you to use a single IC.

If you need to drive a 7 segment display, you can get an IC to do it for you.