Hi, thanks for your feedback,
@cassie yes I want animate the wawe between slides positions, or with a delay between naimations :
1) move background image
2) wave rotation with a small delay
3) end of wave rotation, animate content (fadeIn/Out)
to get there I went through the event onStart and pass the striperRotate function.
Also to have the wave between the background images and the content and avoid putting absolute position on the content I created 2 timeline inside slideAnim function, one in the background with the images and a second one in front with the content, the wave is between two. Because when the wave is down, sometimes I'll have content that goes over it.
@mikel
With ScrollTrigger the problem is that I don't have a scrollbar in the window so when I tried it didn't work, I'm not sure if it would work and if I would have to use ScrollTrigger I would have to redo the whole code