Question How to make shooting animation work

Hi;

I have been making an FPS game, and wanted to add some shooting animations to my gun. I have tried to code it into my script, but it doesn't work. Is there a good way to fix this?

/code
using System;
using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using TMPro;

public class Gun : MonoBehaviour{

[Header("Gun Settings")]
public float damage = 10f;
public float range = 100f;
public float fireRate = 15f;
public float impactForce = 30f;

public int maxAmmo = 10;
public int currentAmmo;
public float reloadTime = 1f;
private bool isReloading = false;
private bool isScoping = false;
private bool isFiring = false;

[Header("Gun Assets")]
public Camera fpscamera;
public ParticleSystem muzzleflash;
public GameObject impactEffect;

private float nextTimeToFire = 0f;

public Animator animator;

[Header("UI")]
public TextMeshProUGUI ammoDisplay;

void Start ()
{
currentAmmo = maxAmmo;
}

void OnEnable ()
{
isReloading = false;
animator.SetBool("Reloading", false);

isScoping = false;
animator.SetBool("Scoping", false);

isFiring = false;
animator.SetBool("Firing", false);
}

// Update is called once per frame
void Update ()
{
ammoDisplay.text = currentAmmo.ToString() + "/" + maxAmmo;

if (isReloading)
{
return;
}


if (currentAmmo <= 0)
{
StartCoroutine(Reload());
return;
}

if (Input.GetKeyDown(KeyCode.R) && isReloading == false)
{
if(currentAmmo == maxAmmo)
{
return;
}
else;
{
StartCoroutine(Reload());
return;
}

}

if (Input.GetButton("Fire1") && Time.time >= nextTimeToFire)
{
nextTimeToFire = Time.time + 1f / fireRate;
Shoot();
}

}

IEnumerator Reload ()
{
isReloading = true;
Debug.Log("Reloading...");

animator.SetBool("Reloading", true);

yield return new WaitForSeconds(reloadTime);

animator.SetBool("Reloading", false);

currentAmmo = maxAmmo;
isReloading = false;
}
/code