This is a Gif made with 1 image. How does it work? Simple, I moved that one image. Just saying, this was standard Gif, but it it's converted into a frame sheet, basically all I'm doing is moving the image instead of the file doing it itself, so it's pretty easy to do it, although it took me a bit to make this. But before you start making all your animations like this there's one small issue that will cause a big problem, this GIF is only 1.7 second loop, and confined to a small box because of you can only zoom up to 152% on an image, so if you were going to make an animation longer than 2 seconds, you would need to make the box smaller and likely lower the framerate, and this GIF is already at 2.22 frames per second so if you want to make a decent length animation using one image go ahead, but I can guarantee it won't look pretty.
Notice: This project was made in scratch 2.0, GIF files were not supported in that version Mario Just FYI, for now I'll probably won't make as many projects because of my busy school schedule.