Creating falling animation with looping effect

Same as @Mylenium I can't see this anywhere on the frankieshop website, so it might help if you can describe the action more, 

1.  Are the objects moving down the page as they appear in the image, with no rotation?  In which case check out the Offset effect
2. Are the objects spinning, but maintaining the same distances from each other as they move down?  In which case, put each object on its own layer, keyframe the rotations and then use an Adjustment Layer with the offset effect
3. Are the objects tumbling randomly, passing each other?  In which case, you could spend some time with CC Particle Systems II, with all the objects in a precomp and have Particle Systems II choose frames at random OR you could manually animate each object falling in a precomp, then loop this precomp.

I looked it up, but I can't find any such scrolling anywhere. On a hunch it's probably just an infinitely scrolling background created in the actual webpage code and that would equate to using the Motion Tile effect, assuming there's nothing else going on.

Mylenium