void Start()
    {
        invicinbleEffect=Instantiate(Resources.Load("Prefabs/InvicinbleEffect")) as GameObject;
        particle = invicinbleEffect.transform.GetComponent<ParticleSystem>();
    }

    // Update is called once per frame
    void Update()
    {
        switch (playerState)
        {
            case PLAYER_STATE.normal:
                skillText.enabled = false;
                GameManager.SkillIconActive(false);
                particle.Stop();
                speed = moveSpeed;
                break;
            case PLAYER_STATE.isvincible:
                particle.Play();
                speed = invicinbleSpeed;
                StartCoroutine(Isvincible());
                break;
            default:
                break;
        }