Procedural Animations

I don't know if I'm using procedural right in the title so correct me if I used it wrong but here's my idea.

My idea is letting the player choose when an animation plays, for instance, when you're creating a mob that flies and walks, you could have one animation for when it's walking while having another one for flying, I created this image to give the idea better.

https://imgur.com/gallery/Hix90NT

Also the newest version of Mcreator to my knowledge doesn't support Geckolib but correct me if I'm wrong, but either way this would add a lot more customization