extends ReferenceRect

export var speed = 2

# Called when the node enters the scene tree for the first time.
func _ready():
	$Lifter.position.y = self.rect_size.y


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _physics_process(delta):
	if $Lifter.position.y < 100 or $Lifter.position.y > self.rect_size.y:
		speed = -speed
	$Lifter.position.y -= speed
	$Lifter.constant_linear_velocity.y = -speed