Action that makes an Attack Animation with Geckolib and Mcreator

Greetings, my problem is that. I want to make a mob attack from a custom animation with Geckolib.
Yes, I know about the installation, how to put animations and how to place it in procedures and make it work 
(In this case, make a mob activate the animation when walking) But my problem is that I can not do that when the entity attacks, 
the animation is activated and I would like someone to help me, I would appreciate it very much.