我该如何实现2D角色的连招?How do I implement a 2D character combo?

How do I implement a 2D character combo?Or what plug-ins are available?Or state machine?
It would be nice to have a video tutorial.
If officials see this problem, they hope to keep the video of “paper2D” because the original video is a bit old.

Could explain more what you mean by “character combo?”

Ummm, You press the attack key, and the attack character plays the animation of the left-hand attack,
The character will play an animation of right-handed attacks. In fact, if you press an attack key continuously, this set of attack animation will be played in sequence.