How can I make NPCs wait for few seconds before navigating again?

Question

`extends "res://Characters/NPCs/PlayerDetection.gd"

onready var destinations = $"../../Destinations".get_children()
onready var timer = $Timer

onready var navAgent : NavigationAgent2D
var target_pos: Vector2

var state = NAVIGATE

enum {
IDLE,
NAVIGATE
}

func ready():
navAgent = $NavigationAgent2D
randomize()
decidedest()

func physicsprocess(delta):
match state:
NAVIGATE:
navigate()
IDLE:
idle_state()

func decidedest():
targetpos = destinations[randi() % destinations.size() - 1].position

func navigate():
navAgent.settargetlocation(targetpos)
var targetloc = navAgent.getnextlocation()
lookat(targetloc)
var direction = position.directionto(targetloc)
var velocity = navAgent.maxspeed * direction
moveandslide(velocity)
if navAgent.istarget_reached():
state = "IDLE"

func idlestate():
if timer.isstopped():
timer.start()

func onTimertimeout():
decidedest()
state = NAVIGATE`

Answer 1

Timers are nice but since you use a STATE MACHINE like setup
delta time would be even better.

var idle_time = 0

func physics_process(delta):
    match state:
        IDLE:
            if idle_time > 0:
                idle_time -= delta
            else:
                idle_time = 0
                state = NAVIGATE
    ...........
    ...........
    if navAgent.istarget_reached():
        state = IDLE
        idle_time = 3.0 # 3 seconds