This is very simple! For example, in the first case you mentioned: this involves frame-by-frame animation. After you draw the character, insert key frames in the next few frames (depending on your needs). Then you will find that the few frames you inserted are all the same when you click on them. Then you can click on the next frame according to your needs and just delete the unnecessary parts! It’s quite simple! In fact, you don’t have to click one by one. Frames can also be used, it’s easier to make it better with tweened animation! It’s up to you!