aiming at target

    private Animator Character_animator;
    private bool shoot__ = false;
    private bool walk__ = false;
	private bool walk_back = false;

    public Transform target;
    public bool attack = true;
    private float speed = 2;

    // Use this for initialization
    void Start()
    {
        Character_animator = GetComponent<Animator>();
    }

    // Update is called once per frame
    void Update()   {

        Character_animator.SetBool("fire", shoot__);
        Character_animator.SetBool("walk", walk__);
        Character_animator.SetBool("walk_back", walk_back);


		if (Input.GetKey(KeyCode.UpArrow)) {
			transform.position += transform.forward * speed * Time.deltaTime;
			walk__ = true;
		}
		else {
			walk__ = false;
		}


		if (Input.GetKey(KeyCode.DownArrow)) {
			transform.position -= transform.forward * speed * Time.deltaTime;
			walk_back = true;
		}
		else {
			walk_back = false;
		}

 		 if (Input.GetKey(KeyCode.LeftArrow)){
  			transform.Rotate(0,-6f,0);
 		 }
	    if (Input.GetKey(KeyCode.RightArrow)){
  			transform.Rotate(0,6f,0);
 		 }

    }


    void OnAnimatorIK()
    {

        if (attack == false)
        {
            Character_animator.SetLookAtWeight(0, 0, 0, 0, 0);
            shoot__ = false;

        }
        else
        {
            shoot__ = true;
            Character_animator.SetLookAtPosition(target.transform.localPosition.normalized);
            Character_animator.SetLookAtWeight(1,1,1,1,1);

        }

    }