OK, here we are. This is how I implemented the scrolling background in Spy Jumper. Pretty simple. Basically it takes images that are width by (width/2). They are stacked on top of each other. It basically recycles one of 6 sections (or however many you want to set) to the top of the screen. Speed can be adjusted for the scrolling and I use a formula to calculate for screen densities.
In the below image is 4 different sections of background being called. 0,0,1,2,3,0
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