func generate_animation(anima_tween: Tween, data: Dictionary) -> void: var frames = [ { percentage = 0, from = 1 }, { percentage = 25, to = 0 }, { percentage = 50, to = 1 }, { percentage = 75, to = 0 }, { percentage = 100, to = 1 }, ] anima_tween.add_frames(data, "opacity", frames)