Delete only one instance

Question

Hi, I made an arrowUp scene and a timer to spawn. If I press "ui_up" button it's deleting all the objects that has been added to a world.tscn. What I wanna do is delete one arrowUp scene not all the arrowUp instanced scenes.

World.tscn

var arrowUpScene = preload("res://Scenes/ArrowUp.tscn")

func spawnArrowUp():
    var arrowUp = arrowUpScene.instance()
    arrowUp.speed = randi() % 270 + 990
    arrowUp.global_position = Vector2(hotSpot.position.x + 800, hotSpot.position.y - 15)
    add_child(arrowUp)

func _on_spawnTimer_timeout():
spawnArrowUp()
timer.wait_time = rand_range(1, 2)

arrowUp.tscn

extends Area2D

onready var anim_p = $AnimationPlayer

var speed = 270
var pressed = false

func _physics_process(_delta):
    if !pressed:
        position.x -= speed * _delta

    if Input.is_action_just_pressed("ui_up"):
        if Global.arrowUpOnHotspot:
            pressed = true
            anim_p.play("success")
        else:
            pressed = true
            anim_p.play("fail")

func _on_ArrowUp_area_entered(area):
    if area.is_in_group("listener"):
        Global.arrowUpOnHotspot = true

func _on_ArrowUp_area_exited(area):
    if area.is_in_group("listener"):
        Global.arrowUpOnHotspot = false

func _on_AnimationPlayer_animation_finished(anim_name):
    if anim_name == "success":
        queue_free()
    if anim_name == "fail":
        queue_free()

Answer 1

I think the problem is that you are using a global variable as a condition. When you use Global.arrowUpOnHotspot = true you are modifying that variable for all instances that use it. One way to fix this is to create a local variable in the ArrowUp script to use as a condition.