如何重置转换.旋转位置

我希望能够通过单击鼠标左键将对象旋转到（15,0,0），然后在大约一秒钟后将其旋转回（0,0,0）。

问题是，它不会向后旋转，我似乎无法让它旋转。

using UnityEngine;
using System.Collections;
public class HitScript : MonoBehaviour
{
    private bool ifswung;
    // Use this for initialization
    void Start()
    {
        ifswung = false;
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            if (ifswung == false)        
            {
            transform.Rotate(15, 0, 0);
            ifswung = true;
              }
            else if(ifswung == true)
            {
                transform.Rotate(0, 0, 0);
                ifswung = false;
            }
        }
    }
}

public class HitScript : MonoBehaviour
{
    private Vector3[] rotations = { new Vextor3(15f,0f,0f),Vector3.zero } ;
    private in index = 0;
    // Update is called once per frame
    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            if(++index >= rotations.Length)index = 0;
            transform.rotation = Quaternion.Euler(rotations[index]);
        }
    }
    //transform.rotation = Quaternion.Lerp(transform.rotation,
      //                      Quaternion.Euler(rotations[index]), Time.deltaTime);
}