essentially the idea is just some kind of maybe markdown?? that lets you desegnate frames, so it loops through sections of text like frames

The way I usually do this is in a spreadsheet. I put each frame in a cell and then create a self-referencing formula using iterative calculation. This updates any time a change is made (including pressing backspace on an empty cell) and resets to 1 when it goes above a certain value. Using some other logic in another cell, it uses this counter to display frames sequentially, so it runs through them when you press backspace, the framerate depending on how fast you press, or if you hold it

Ideally tho, on a website, the idea is that you would have some way of inputting each frame, marked as being a frame in a sequence, and then when you post, it cycles through them, maybe with some way to specify framerate