Sorry for the confusion and being unclear on what i'm after. I not very code literate with my lingo and skills. I know in my mind what I want the code to do. Let me try to make this clearer what i'm after.

How is the points cloud being cut down each time though, this is the part where i need the loop at. I start with 128 then decrease to 64..32..16..8...4..2..1.. .5... .25. My thoughts are that you would set an integer at this part in the code (where the red 64 is at on previous reply). So set this as L. So what i want on the first run I need the value set at 128, and on the second run set L equal to 64. Basically I need a loop to decrease L by 1.5 each time untill L equals .25. To add to this I would like easily be able to change the fraction that i decrease the point cloud by for future use.

Thanks, for the help so far.