Gun Script Help

Hello everyone, i am making a gun script, so far it has bullet holes, sound, and ammo. But there is a few things that arnt working the way i want. In the script, i was wondering if there was a way that when my variable "clip" gets down to 0, then play another sound, but that doesnt work, and i was also wondering how to make the bullethole texture stop appearing when my variable "clip" gets down to zero. One last question, is there a way to display a hitmarker when the raycast hits a certain tag? i have no idea how to use tags, i should though, but i cant.

Here is the Script (if anyone wants to use it, you just have to put it on your "MainCamera")

 var bulletTex : GameObject[]; // creates an array to use random textures of bullet holes
  
 var power : int = 10; //provides power to our raycast that can affect our rigidbody components
  
 var fireRate : float = 0.1;
 
 var clip : float = 30;
 
 var reloadTime : int = 2;
 
 
 
  
 private var nextFire : float = 0.0;
  
 var gunShot : AudioClip;
 
 var dryShot : AudioClip;
  
 function Update () {
  
 Fire ();
  
 }
  
 function Fire () {
  
 if(Input.GetButton("Fire1") && Time.time > nextFire) {
  
 nextFire =  Time.time + fireRate;
  
 AudioSource.PlayClipAtPoint(gunShot, transform.position, 1);
  
 ForceFire();
  
 }
  
 }
  
 function ForceFire () {
  
 var fwd = transform.TransformDirection(Vector3.forward); //casts our raycast in the forward direction
  
 var hit : RaycastHit;
  
 Debug.DrawRay(transform.position, fwd * 100, Color.green); //drays our raycast and gives it a green color and a length of 10 meters
  
 if(Input.GetButton("Fire1") && Physics.Raycast(transform.position, fwd, hit, 10)){ //when we left click and our raycast hits something
  
 Instantiate(bulletTex[Random.Range(0,3)], hit.point, Quaternion.FromToRotation(Vector3.up, hit.normal)); //then we'll instantiate a random bullet hole texture from our array and apply it where we click and adjust
  
 // the position and rotation of textures to match the object being hit
  
 if (hit.rigidbody !=null)
  
 hit.rigidbody.AddForceAtPosition(fwd * power, hit.point);  //applies a force to a rigidbody when we click on it. Multiples our forward raycast times our power variable at the position we click
  
 }
  
 
 
 
 if(Input.GetButton("Fire1")) {
 
 Debug.Log ("It's getting to function Reload");
 
 yield WaitForSeconds (fireRate);
 clip = clip -1;
 }
 
 if(clip == 0) {
  yield WaitForSeconds (reloadTime);
  
  clip = 30;
 
 if(Input.GetButtonDown("Fire1") && clip == 0); {
 
 AudioSource.PlayClipAtPoint(dryShot, transform.position, 1);
 
 if(Input.GetKey("r")) {
 clip = 30;
 }
 
 }
 
 } 
 }