Continuous Scrolling Images

Hi there. I'm not sure if there's a convenient way of doing this, but basically I need to have about 12 images of different sizes enter the screen from the right, and leave the screen on the left, one after another as if they're stitched together at the edges; so moving at the exact same speed.

I could piece them together in photoshop to create one ultra-wide image, but I'm going to have to do this for a bunch of different image collections, so hoping to avoid repeated work where possible.

Does anyone have any suggestions?

Thanks!