How to change int of a var in a other scene in godot

[system]

	Attention	Topic was automatically imported from the old Question2Answer platform.
	Asked By	NotImportant

I try to make a game and I have a problem…

I have the scene of an enemy and connected his attackArea with his kinematicbody. In an other scene ( Player ) I have the variable health.
And when the body entered then I try to subtract the variable health by 10

How is this possible???

I tried with get_node("/root/Player) but it didnt work…

For anybody who needs it, here is my enemy scrpt:

extends KinematicBody2D

export var health = 50
export var speed = 100.0
export var attack_load = 0.4

var velocity = Vector2()
var player = null

var can_attack = true

func _physics_process(delta):
	velocity = Vector2()
	if player:
		velocity = position.direction_to(player.position) * speed
	velocity = move_and_slide(velocity)
	if health <= 0:
		queue_free()

func _on_Area2D_body_entered(body):
	player = body


func _on_Area2D_body_exited(body):
	player = null


func _on_AttackArea_body_entered(body):
	if can_attack == true:
		get_node("/root/Player")health -= 5
		can_attack = false
		yield(get_tree().create_timer(attack_load), "timeout")
		can_attack = true 

[system]

	Reply From:	Noddy

Two things, you can either use a singleton or the generally more advisable route which is to create a damage taking function in the player script name it some thing like take_damage(damage : int)and then use the parameter as the amount of damage you want done to the player. In the enemy script you can then call the function on the player like this player.take_damage(5). As a side note the _on_Area2D_body_entered(body) is in a somewhat dangerous position since it doesn’t check if the body entered is actually the player, this can be a problem if another enemy or some other physics body or area enters the Aread2D. I suggest doing this by checking the name of the body or checking if the body is in some group that only player characters are in.