Help me pleaase!!! Problems with shooting script and reload

Hello I have this script that I got and implement some things in it, the problem is when reload the gun bullets station eg in texture 30/60, then 30/30, then 30/0, there when I spend these 30 rounds, the to recharge there ficaa 30 / -30, please help me, help me very much!

var bulletTex : GameObject[];

var power : int = 10;

var fireRate : float = 0.5;

private var nextFire : float = 0.0;

var gunShot : AudioClip;

var bullets : int = 5;

var reloadSound: AudioClip; //reload soundClip

var Balas = 30; //amount of coconuts per "clip"

var totalBalas = 60; //total amount of coconuts we have available

var reloadTime = 3; //time to reload

var reloadAmount = 10;

var ammo : GUIText; //GUI text for our coconut/ammo count

function Update () {

Reload ();

Fire ();

}

function Fire () {

if(Balas > 0) { //if we have at least 1 coconut then we can 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 * 10, 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 bullets--;

Instantiate(bulletTex[Random.Range(0,1)], 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

if(hit.collider.gameObject.tag == "Inimigo"){ //hit.rigidbody.AddForceAtPosition( direction * 100 , hit.point); //hit.collider.gameObject.animation.Play("die"); hit.collider.gameObject.SendMessage("ApplyDamage", 25);

} // 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

}

Balas -=1;

} function Reload () {

if(Balas < 1) { //if we have less than 1 coconut then we can reload

if(Input.GetKeyDown("r")) {

AudioSource.PlayClipAtPoint(reloadSound, transform.position, 1); //plays reload soundclip

yield WaitForSeconds(reloadTime); //waits for "reloadTime" before adding coconuts

Balas += reloadAmount; //adds 3 coconuts to our "clip"

totalBalas -= reloadAmount; //subtracts 3 coconuts from our totalCoconuts amount

if (totalBalas < 0) { totalBalas--;

}

}

}

}

function OnGUI () {

ammo.text = "Balas: " + Balas + "/" + totalBalas.ToString();

}