I need to draw a simple rectangle and then have it repeat in a row down the frame at precise intervals. I have tried using the grid and replicate effects but my results are always wonky and not what I am after. Sometimes it cuts part of the shape off... or when I get the distance between the shapes right the shape has been shrunken too much. Scaling it up throws the distance between the shapes off. I have tried looking for tutorials on applying these effects to shapes but I can't really find any. Could someone point me in the right direction for some education on this? Thanks!
What I'm trying to do:
I am trying to create a simple film strip visual, with the perforations on the right and left of the frame. The perforations are white rectangles with rounded corners on top of a long skinny black rectangle. I drew one white "perforation", and I would like to somehow replicate it in a single row down the side of the frame. The goal is to animate it scrolling upward.
I tried looking for a template that did this, but although there are many that are close to what I need, none are precisely it. Would this be better done in AE?