var cena1 = preload("res://cena1.tscn").instance()
var cena2 = preload("res://cena2.tscn").instance()
func _on_Button_pressed():
###exclui a cena
get_node("/root/cenaprincipal").queue_free()
func _on_Button_pressed():
####add a cena carregada na variavel
get_tree().get_root().add_child(cena1)
pass # Replace with function body.