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.
Who dares wins