What is a best way to learn how to make a AI in game maker. Thread

I have problems making A.I in Game Maker with game maker language.(GML) I need some advice on how can I make a good A.I. for 2d games. Like making a npc moving around the room random like a rpg,making a game platform enemy move back and forth. Any good help or advice?

I'd start with a good ol' pencil and paper. Make a flowchart showing what you want to happen and when you want it to happen. (EG: Wander around until an enemy is spotted. Then randomly choose between hiding or attacking). Break it down as much as you can, and then implement it, piece by piece.

Edited by: ANumberSquared