Unit Fly height

Hi, I was wondering how do u change that, doesnt matter if it can be done by jass only...help plz
edit: I would also like to know whats the diference between "For each integer A do multeple actions" and "For each integer B do multeple actions"

Animation - Change Fly Height (or something).

No difference between for loop integer A and for loop integer B, but you might want to have a loop within a loop, and still have both values.

thankz, im going to test it.
rep for u :)