```python
extends Node2D

var item_scenes := [
	preload("gem.tscn"),
	preload("health_pack.tscn")
]

func _ready():
	get_node("Timer").timeout.connect(_on_timer_timeout)



func _process(delta):
	pass


func _on_timer_timeout() -> void:	

	var random_item_scene: PackedScene = item_scenes.pick_random()
	var item_instance = random_item_scene.instantiate()
	add_child(item_instance)
	
	var viewport_size = get_viewport_rect().size
	var random_position := Vector2(0,0)
	random_position.x = randf_range(0, viewport_size.x)
	random_position.y = randf_range(0, viewport_size.y)
	item_instance.position = random_position
```