[Petty Munroe]

Well, I got as far as re-creating this film strip with my own images, but now I’ve been pulling my hair out for weeks, trying to modify the animation to where it runs in a continuous loop with NO interruption in the actual strip (where it doesn’t come in from the top, every time the movie starts over, but rather keeps “circling”).
Any ideas on how this could be achieved here?

If it’s absolutely necessary, I could probably go with the effect from this tutorial https://library.creativecow.net/articles/bobotis_chris/filmstrip.php
but the “wavy” strip looks so much nicer. So if anyone could maybe give me a hint, on how to achieve the continuous loop for the “wavy” filmstrip, it would be greatly appreciated. Thanks!