PNUで使用したコルーチンの中身

	private IEnumerator hotaru() {
		Debug.Log ("start rainbow");
		while (true) {
			//Debug.Log (destColor);
			float myHue = 0;
			currentColor =  Color.HSVToRGB (0.5f, 1f, 1f);
			destColor = Color.HSVToRGB (myHue, 1f, 1f);
		//	t += (Time.deltaTime) / duration;
		//	Camera.main.backgroundColor = Color.Lerp (currentColor, destColor, t);
		//	if (t > 1.0) {
		//		currentColor = destColor;
		//	}
			yield return new WaitForSeconds (1.0f);//color hold time
			t = 0;
			if (myHue > 1.0f) {
				myHue = 0;
			} else {
				myHue += 0.2f;
			}
		}
	}