Help with a gun script used in the fps tutorial

I am wanting to make the script where I can turn it off and on from being semi automatic ( you press the button once and the gun fires once and it won’t fire it again until you press it again ) please if somebody could give me the edited script

var cameraObject : GameObject;

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var targetXRotation : float;

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var targetYRotation : float;

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var targetXRotationV : float;

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var targetYRotationV : float;

var rotateSpeed : float = 0.3;

var holdHeight : float = -0.5;

var holdSide : float = 0.5;

var racioHipHold : float = 1;

var hipToAimSpeed : float = 0.1;

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var racioHipHoldV : float;

var aimRacio : float = 0.4;

var zoomAngle : float = 30;

var fireSpeed : float = 15;

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var waitTilNextFire : float = 0;

var bullet : GameObject;

var bulletSpawn : GameObject;

var shootAngleRandomizationAiming : float = 5;

var shootAngleRandomizationNotAiming : float = 15;

var recoilAmount : float = 0.5;

var recoilRecoverTime : float = 0.2;

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var currentRecoilZPos : float;

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var currentRecoilZPosV : float;

var bulletSound : GameObject;

var muzzelFlash : GameObject;

function Update ()

{

var holdMuzzelFlash : GameObject;

var holdSound : GameObject;

if (Input.GetButtonDown("Fire1"))

{

	if (waitTilNextFire <= 0)

	{

		if (bullet)

			Instantiate(bullet,bulletSpawn.transform.position, bulletSpawn.transform.rotation);

		if (bulletSound)

			holdSound = Instantiate(bulletSound, bulletSpawn.transform.position, bulletSpawn.transform.rotation);

		if (muzzelFlash)

			holdMuzzelFlash = Instantiate(muzzelFlash, bulletSpawn.transform.position, bulletSpawn.transform.rotation);

		targetXRotation += (Random.value - 0.5) * Mathf.Lerp(shootAngleRandomizationAiming, shootAngleRandomizationNotAiming, racioHipHold);

		targetYRotation += (Random.value - 0.5) * Mathf.Lerp(shootAngleRandomizationAiming, shootAngleRandomizationNotAiming, racioHipHold);

		currentRecoilZPos -= recoilAmount;

		waitTilNextFire = 1;

	}

}

waitTilNextFire -= Time.deltaTime * fireSpeed;

if (holdSound)

	holdSound.transform.parent = transform;

if (holdMuzzelFlash)

	holdMuzzelFlash.transform.parent = transform;

currentRecoilZPos = Mathf.SmoothDamp( currentRecoilZPos, 0, currentRecoilZPosV, recoilRecoverTime);

cameraObject.GetComponent(MouseLookScript).currentTargetCameraAngle = zoomAngle;

if (Input.GetButton("Fire2")){

	cameraObject.GetComponent(MouseLookScript).currentAimRacio = aimRacio;

	racioHipHold = Mathf.SmoothDamp(racioHipHold, 0, racioHipHoldV, hipToAimSpeed);}

if (Input.GetButton("Fire2") == false){

	cameraObject.GetComponent(MouseLookScript).currentAimRacio = 1;

	racioHipHold = Mathf.SmoothDamp(racioHipHold, 1, racioHipHoldV, hipToAimSpeed);}

transform.position = cameraObject.transform.position + (Quaternion.Euler(0,targetYRotation,0) * Vector3(holdSide * racioHipHold, holdHeight * racioHipHold, 0) + Quaternion.Euler(targetXRotation, targetYRotation, 0) * Vector3(0,0,currentRecoilZPos));



targetXRotation = Mathf.SmoothDamp( targetXRotation, cameraObject.GetComponent(MouseLookScript).xRotation, targetXRotationV, rotateSpeed);

targetYRotation = Mathf.SmoothDamp( targetYRotation, cameraObject.GetComponent(MouseLookScript).yRotation, targetYRotationV, rotateSpeed);



transform.rotation = Quaternion.Euler(targetXRotation, targetYRotation, 0);

}

//cameraObject.GetComponent(MouseLookScript).currentTargetCameraAngle = zoomAngle;

Not that hard…
Just needed to delete one word, but its working.
Tested and made myself <–(deleted one word :D)