How automate crops of an image

[stevem0]

I have read thru the html help document,  ofn-scroll-layer.html

I got it as close as I could and it was in some loop, I had to kill the app.  I am a little confused on the waves and amplitude.

If my image is (x,y)  (Horizontal, Vertical)  (2000,100)
What settings should I use to create layers that are 750x100, With starting point = 0 and then 10 pixel increments in horizontal?

Thank You.