Only one of all my Enemies shoots, Help please.

I am working in a top down view 2D shooter, I am mixing some 3D models and 2D sprites.
I managed to get collision from lasers to the enemies no problem, the part I am stuck at is that I want my enemies to shoot at me. I have a script which is working properly, tank turrets that rotate towards the player and supposedly shoot.

My problem is that when I have 2 or more tanks, only one of the tanks will shoot. I mean, all the tanks aim at the player, but only will shoot. I did notice something, though, every time a new tank is added to the scene, the only tank that shoots seems to do it faster. I think it is shooting according to the number of tanks in the scene and what I want is every thank to shoot on its own.

I will post the code that I have for the what I need.

Any help will be greatly appreciated.

using UnityEngine;
using System.Collections;

public class tankShoots : MonoBehaviour 
{
    private float baseTime = 30.0f;
    private float coolDown = 1.0f;
    private float timeReset = 30.0f;
    private float zeroTime = 0.0f;
    private GameObject tankGun;

    public GameObject tankProjectile;
	// Use this for initialization
	void Start () 
    {
        tankGun = GameObject.FindGameObjectWithTag("tankGun");
	}
	
	// Update is called once per frame
	void Update () 
    {
        tankShooting();
	}

    void tankShooting()
    {
        baseTime -= coolDown;
        if(baseTime <= zeroTime)
        {
            Instantiate(tankProjectile, tankGun.transform.position, tankGun.transform.rotation);//tankGun.transform.rotation);
            baseTime = timeReset;
        }
    }
}

I think the problem may be that you are using:

void Start () 
        {
            tankGun = GameObject.FindGameObjectWithTag("tankGun");
        }

Because all your tanks have the “tankGun” tag it is finding the same tank every time. That’s why it’s shooting faster with more tanks, it’s selecting the same tank every time instead of a new one.

It would be better if you just set your enemy tank prefab to have a public variable for each tank, and then assign the tankGun object to the variable. That way whenever you instantiate a new tank it will automatically have the correct tankGun selected.