Hi Dop,
Thanks for coming back to me.
Really sorry for the horrible explanation.
Simply I have a background which I've designed on photoshop and the height is 7806px and width is 640px.
The game canvas size is 720x1280 and I scaled the background to that size. The idea I have is when the user jumps higher the background moves. Apologies if that's a repeat of what I wrote before that's as simple as I can explain it.
With the parallax effect what settings would I use to make it so when the user gets to the top of the platforms it moves.
Below is the full view of the game in portrait mode. So the user will only see 720x1280 and when they slightly reach the top platform the background moves slowly slowly to match that. New platforms forms once they reach the top.