How do make a Alert moving stats for an enemy for 4.x

[noble sierra]

Im making a dungeon and has enemies that won't move until you damage it and it will start to chase you or when you get too close

[proven drum]

Create new A = self.current health
↓ Execute command start moving
Keep wait until self with main actor distance < 3 or self current health ≠ A
Execute command start chasing main actor
Set A = current health

[rare willow]

You can use a collision detector for how close the actor is and the “when hit” to make it chase the thing that hit it