If you mean animations, then you can simply update the current sprite you have for the enemies. Just add extra frames, and set it to loop.
If you want to add more animations, then open the sprite in the editor, and on the right should be a small window with the default animation, right click here to add a new animation and add your frames.
In the event sheets you can set the object to play a desired animation at certain conditions.
Erm I am a total beginner to this to be honest. What I need is my Enemy to use the animations Walk Left, Walk Right etc so that when they are moving they are facing the right direction with the correct animations. I hope this makes sense.