Although the question seems simple to someone who knows how it works, there are aspects that are not immediately obvious to everyone (like how can there be more than 2 frames of animation?).
I don't feel that the fact that it can be done on paper is a problem. You can paint a 3D scene on paper, or you can generate and print a 3D scene on paper using a computer. We don't want questions on painting by hand, but questions on generating images to later be printed on paper are fine (as long as it is about how to generate the image, not how to change the paper).
I can see there being valid questions on the topic of grating animations, and how to write a program that generates images suitable for a given grating. The explanation of how they work is simple, but I'd expect there to be subtleties beyond that. For example, the transition between frames may be able to be smoothed by considering the shapes of the strips of image.
The only thing I would change is to show what you have tried. Hopefully this will also narrow it down to "I'm confused about this aspect" rather than a general "how does this work?".