public override void Act(GameObject player, GameObject npc)
    {
        // get battleship
        BattleshipBoss battleship = npc.GetComponent <BattleshipBoss>();

        if (battleship)
        {
            // Use weapons
            if (Time.time >= battleship.NextFireTime)
            {
                // Set cooldown
                float cooldown = 3.5f;
                battleship.NextFireTime = Time.time + cooldown;

                // Center sphere
                battleship.weapons[0].fire();

                // Center bubbles
                battleship.weapons[1].fire();

                // Side bolts
                battleship.StartCoroutine(battleship.delayAimFire(battleship.weapons[4], player, 0.5f));
                battleship.StartCoroutine(battleship.delayAimFire(battleship.weapons[5], player, 1.0f));

                // Side spheres
                battleship.StartCoroutine(battleship.delayAimFire(battleship.weapons[2], player, 2.0f));
                battleship.StartCoroutine(battleship.delayAimFire(battleship.weapons[3], player, 2.5f));
            }
        }
        else
        {
            Debug.LogWarning("This state can only handle Battleship.");
        }
    }
    public override void Act(GameObject player, GameObject npc)
    {
        // get battleship
        Battleship = npc.GetComponent <BattleshipBoss>();
        if (Battleship)
        {
            // Move to the position
            Vector3 pos = npc.transform.position;
            if (pos.z > Battleship.ZMin)
            {
                float speed = Battleship.verticalSpeed;
                npc.transform.position += speed * Time.deltaTime * npc.transform.forward;
            }

            // Randomly move right or left
            if (Time.time >= Battleship.NextMoveTime)
            {
                // Set next move time
                float duration = Random.Range(0.5f, 2.0f);
                Battleship.NextMoveTime = Time.time + duration;

                // X-axis speed
                Rigidbody rigidbody = npc.GetComponent <Rigidbody>();
                float     sign      = -Mathf.Sign(pos.x);
                rigidbody.velocity = new Vector3(sign * Battleship.horizontalSpeed, 0.0f, rigidbody.velocity.z);
            }

            // Use weapons
            if (Time.time >= Battleship.NextFireTime)
            {
                // Set cooldown
                float cooldown = 3.5f;
                Battleship.NextFireTime = Time.time + cooldown;

                // Center bubbles
                Battleship.weapons[1].fire();

                // Side bolts
                Battleship.StartCoroutine(Battleship.delayAimFire(Battleship.weapons[4], player, 1.0f));
                Battleship.StartCoroutine(Battleship.delayAimFire(Battleship.weapons[5], player, 1.0f));
            }
        }
        else
        {
            Debug.LogWarning("This state can only handle Battleship.");
        }
    }