could someone tell me whats wrong with this script?

I've been making a FPS and I've been trying to get my M16 Model to fire. My script is below

var range = 100.0;
var fireRate = 0.05;
var force = 10.0;
var damage = 5.0;
var bulletsPerClip = 40;
var clips = 20;
var reloadTime = 0.5;
private var hitParticles : ParticleEmitter;
var muzzleFlash : Renderer;
private var bulletsLeft : int = 0;
private var nextFireTime = 0.0;
private var m_LastFrameShot = -1;
function Start ()
{
hitParticles = GetComponentInChildren(ParticleEmitter);
// We don't want to emit particles all the time, only when we hit something.
if (hitParticles)
hitParticles.emit = false;
bulletsLeft = bulletsPerClip;

function LateUpdate(){
}
if (muzzleFlash)
{
// We shot this frame, enable the muzzle flash
if (m_LastFrameShot == Time.frameCount)
{
muzzleFlash.transform.localRotation =
Quaternion.AngleAxis(Random.Range(0, 359), Vector3.forward);
muzzleFlash.enabled = true;
if (audio)
{
if (!audio.isPlaying)
audio.Play();
audio.loop = true;
}
}
// We didn't, disable the muzzle flash
else
{
muzzleFlash.enabled = false;
enabled = false;
// Play sound
if (audio)
{
audio.loop = false;
}
}
}

Could someone tell me what is wrong with it beacause I'm at a loss at what to do

Also, you are missing a bracket from the Start function:

function Start ()
{
hitParticles = GetComponentInChildren(ParticleEmitter);
// We don't want to emit particles all the time, only when we hit something.
if (hitParticles)
hitParticles.emit = false;
bulletsLeft = bulletsPerClip;
}

Where your function LateUpdate is, replace all that with this:

function LateUpdate()
{
    if (muzzleFlash)
    {
        // We shot this frame, enable the muzzle flash
        if (m_LastFrameShot == Time.frameCount)
        {
            muzzleFlash.transform.localRotation =
            Quaternion.AngleAxis(Random.Range(0, 359), Vector3.forward);
            muzzleFlash.enabled = true;
            if (audio)
            {
                if (!audio.isPlaying)
                audio.Play();
                audio.loop = true;
            }
        }
        // We didn't, disable the muzzle flash
        else
        {
            muzzleFlash.enabled = false;
            enabled = false;
            // Play sound
            if (audio)
            {
                audio.loop = false;
            }
        }
    }
}

You had a few brackets in the wrong place