extends CanvasLayer

@onready var rect = $ColorRect as ColorRect

var tween


func dizzy(duration := 2.0):
	if tween and tween.is_valid():
		tween.kill()
	show()
	tween = create_tween()
	tween.tween_property(rect.material, "shader_parameter/intensity", 0.7, 0.2)
	tween.tween_property(rect.material, "shader_parameter/intensity", 1.3, 0.2)
	if duration > 0.0:
		tween.set_loops(max(duration / 0.4, 1))
	else:
		# infinite
		tween.set_loops(10000)
	tween.tween_callback(hide)