Carpet coloration specific parts Hi!

I made a carpet and I am looking to add a color on specific part.

I tried brush but it is not satisfaying. 

Looking for something like this: https://youtu.be/kv0q6EPJHKk?t=242

Thanks
Answer to Ratt :have you considered Creating a patterned carpet

Thanks very Much. I did not created a new mesh because I wantted to keep this. So I just made a simple texture and add it to the mesh: