Reply to BCD3000 +Traktor PRO Loop Sizing

Hey all Im using BCD3000 And legit TRAKTOR PRO..
Can some one tell me how Im sizing the loop?
I mean like .. Im on loop 8 and i want it to be Like that:
8 and then 4 and then 2 and then 1 and then 1/4.. So I can create nice effect
Please tell me what I should do because Set Loop and Reloop Buttons doesnt help me.