Flash traditional fill-in animation: how to make two frames between the formation of a continuous zoom animation ah? Just don't get to the latter frame and then suddenly jump and change

Use the shape of the patch to do.

Traditional fill-in animation, which became a bit of a dud with the advent of animated fill-in.

Of course, you can use traditional patching, that is, when drawing, make the object into, for example, a graphic element or an object (i.e., when drawing, check the bottom of the toolbar to draw that object):

This is done by rotating it while it grows larger and changes position.