I need some tips on how to animate this like I intended to.
It's like for design purposes only. I want the chain to "move infinitely from left to right" via animation without changing the position
I tried this method (below) to make it seem like a moving animation but it's not a smooth animation:
cut a few pixels from the left side, paste that cut part at the end of the right side, copy new frame, repeat, until first frame is reached (then set loop animation to yes)