How to build a good working enemy system? [Solved]

Anyone know how to make a enemy system that stops some studs before you and then perform beat animation? P.S this is not a request i just ask for a improvement cuz i tried before. oh and i want to the enemy faces you

my old scripts: (There working but if more enemy's attack you they get in the way of each other)

That are all scripts. Any help would be tolerated! If you can combine the scripts into one script that would be nice to!

Btw i also tried to make the position random so he choose between (0,0,5) and (5,0,0) But then he moves a lot and dont function correctly.

EDIT: Solved my self removed source code cuz i dont want people to get it.