void Update ()
    {
		if (Input.GetKeyDown(KeyCode.Alpha1))
        {
			isInBulletHoleMode = false;
        }
        else if(Input.GetKeyDown(KeyCode.Alpha2))
        {
			isInBulletHoleMode = true;
        }

        if (Input.GetMouseButtonDown(0))
        {
			if (isInBulletHoleMode)
            {
				GameObject newBullet = GameObject.Instantiate(bulletPfb);
                newBullet.gameObject.SetActive(true);
                newBullet.transform.position = newBulletPosition.transform.position;
                newBullet.transform.rotation = newBulletPosition.transform.rotation;
                newBullet.GetComponent<Rigidbody>().AddRelativeForce(new Vector3(0f, 0f, 50f), ForceMode.Impulse);
            }
            else
            {
                Ray ray = Camera.main.ViewportPointToRay(Vector2.one * 0.5f);
                RaycastHit hit;
                if (Physics.Raycast(ray, out hit, 50f))
                {
                    Debug.Log("hit : " + hit.collider.name);
					GameObject newBullet = GameObject.Instantiate(bulletHolePfb);
                    newBullet.gameObject.SetActive(true);
                    newBullet.transform.position = hit.point - newBullet.transform.forward * 0.5f;
                    newBullet.transform.rotation = hit.collider.transform.rotation;
                }
            }
        }

        if(Input.GetKeyDown(KeyCode.LeftShift))
        {
			Time.timeScale = 0.2f;
	    	Time.fixedDeltaTime = 0.005f;
        }

		if(Input.GetKeyUp(KeyCode.LeftShift))
        {
			Time.timeScale = 1f;
	    	Time.fixedDeltaTime = 0.02f;
        }
    }