Thats right, they move from right to left, and if they leave the screen they will be repositionated on their old/start position.
The problem is: If i set it up like: if sprite is - 1024 it can happen that there is a small lag or delay and i get a gap between my background sprites. I got four background sprites layers witch are moving trough the sceen an will be repositioned again. And they will move faster and faster and this supports a larger offset, because i think if theyre outsite the screen they will not be replaced on the exact pixel (-1024 (maybe because of latency?))
I thougth i will set it up like: if youre outsite the screen take the current position of the other tiles get their width, and place the repositionated tile exact behind that.
I was hoping that this will avoid these gaps....