extends Sprite2D


func _ready() -> void:
	var y = position.y
	var tween = create_tween()
	# y 负轴为向上
	tween.tween_property(self, "position:y", y - 10.0, 3.0).set_ease(Tween.EASE_IN_OUT)
	tween.tween_property(self, "position:y", y, 1.0).set_ease(Tween.EASE_IN_OUT)
	tween.set_loops(1000000)