Help with my I.A of turret geting new objective

Hello I want to achieve this:
I have turrets that player can create with a radius, turret body and a turret part that rotates when any monster is near and shot him. (in a future will add line of sigh but first need this to work).
-Turrets must select an objective when monster enter in his radius and won't leave it until monster dies or monster leaves from radius
-Turret will only shot and rotate in direction of objective
-(Later will add line of sigh to objective)
-Also need to fix that turret rotate instantly to monster, maybe saving actual angle and new angle and then slowly substract?

I dont know what i'm doing wrong need some help, here is an example of my code, thanks!

up anyone?

Quote from shaku88

what turret should do if 2 enemies is in radius?

if U need smooth rotation, use value with angle to monster, and use fast loop:
every 10ms change direction: actual direction +/- 1
+/- is a secon condition to loop event (IF monster direction > actual direction THEN actual direction ++)

Turret must select the first objective enters in radius, he ignores others until this is dead or leaves radius

Quote from schrodinger

Here's a modified example:

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I've simplified a bit here and there, added a "rotate-to-destination" part,
and the turret shots only if it's in an offset of +/-10 degrees towards target (you can change it in line 13 >> angle_to_dest)
I've moved some of the values to the "visor" object, when useful

Wow that's exactly what I was going for! thanks!, I see where I failed on my first attemp, btw in line 15 you use:
-Attack_timer ("turret_visor")< 60
-every 00"-01
+Add 1 to atack timer

How you target each counter of turrets instead of all since u dont make a foreach? I tought u should do it always when u want to do multiple independent task on objects