okey so i found a random script for raycasting

var damage : float = 1;
function Update(){
   if(Input.GetButtonDown("Fire1")){
      FireOneShot();
    }
}

function FireOneShot(){
   var direction = transform.TransformDirection(Vector3.forward);
   var hit : RaycastHit;

   if (Physics.Raycast (localOffset, direction, hit, 300)) {
   Debug.DrawLine (localOffset, hit.point, Color.cyan);

   hit.collider.SendMessageUpwards("ApplyDamage", damage, SendMessageOptions.DontRequireReceiver);
}
}

it keeps saying unknown identifier "localoffset" so like what should it be?