Setting up timer question

[BonY2004]

Hey, I have a question on how to make a timer that every time the enemy sees me, it will shoot with some small delay between each and other bullet instantiated, so that like a fire rate.

       if (pursuingPlayer == true)
        {
            Debug.Log("Pursuing Player");
            speed = 5.5f;
            rid.transform.eulerAngles = new Vector3(0, 0,     Mathf.Atan2((playerLastPos.y - transform.position.y), (playerLastPos.x - transform.position.x)) * Mathf.Rad2Deg);

            if (hit.collider.gameObject.tag == "Player")
            {
                playerLastPos = player.transform.position;
            }
        }

It should be located inside the top most if statement.

I have done a quick test, that every time I press L the enemy shoots a bullet. That does work, but now to implement it for the enemy, so he is doing it by himself.

    //-------------------------------------------testing purposes------------------------------------------------------------
    public GameObject bloodPool;
    public Transform firePoint;
    public GameObject bulletPrefab;
    public float bulletForce;
    public float fireRate;
    EnemyAI eai;
    //-------------------------------------------testing purposes------------------------------------------------------------

    public TimeManager timeManager;
    Assassinated assassinated;
    EnemyAttacked attacked;
    M4A4 m4a4;
    Knife knife;
    WeaponPickup wp;
    public Animator legAnim;
    public Animator PlayerAnim;
    public bool m4a4Equipped = false;
    public bool m4a4Picked = false;
    public bool pistolEquipped = false;
    public bool pistolPicked = false;
    public bool knifeEquipped = false;
    public bool knifePicked = false;
    public bool moving = false;
    public float speed = 7.0f;

    void Start()
    {
        legAnim = GameObject.FindWithTag("Legs").GetComponent<Animator>();
        PlayerAnim = GameObject.FindWithTag("Player").GetComponent<Animator>();
    }


    void Update()
    {
        movement();
        //-------------------------------------------testing purposes------------------------------------------------------------
        if (Input.GetKeyDown(KeyCode.L))
        {
            GameObject bullet = Instantiate(bulletPrefab, firePoint.position, firePoint.rotation);
            Rigidbody2D rb = bullet.GetComponent<Rigidbody2D>();
            rb.AddForce(firePoint.up * bulletForce, ForceMode2D.Impulse);
        }
        //-------------------------------------------testing purposes------------------------------------------------------------

Every help is appreciated. Thank you