extends Area2D

@export var speed = -250

func start(pos):
    position = pos

func _process(delta):
    position.y += speed * delta

# Signal checks to see if the bullet leaves the viewport then removes bullet.
func _on_visible_on_screen_notifier_2d_screen_exited() -> void:
  queue_free()

func _on_area_entered(area: Area2D) -> void:
  if area.is_in_group("enemies"):
          area.explode()
          queue_free()