Effect chase

Ok, i read the manual and i got alot of information out of it,
Now, there is an effect i cant seem to get the grasp of.

I want to do a light chase, 1 to 6 on the back bar.
and then alternating, IE: 2 to 6 to 4 to 2 to 5 to 1
or 2 and 6 and 4 and 3 and 5 and 1

thanks,
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