Problem:Insert a semicolon at the end.

function Start() { bulletCounter = GameObject.FindWithTag("Counter").guiText; }

function Update() { Fire(); Reload(); }

function Fire () { if(bullets > 0 && Input.GetButtonDown("Fire1")) { // Instantiate the projectile at the position // and rotation of this transform var clone : Rigidbody = Instantiate(projectile, transform.position, transform.rotation);

     // Give the cloned object an initial velocity along its Z axis
     clone.velocity = clone.forward * bulletSpeed;
     AudioSource.PlayClipAtPoint(sound, transform.position, 1);
     //take a bullet off our clip if firing
     bullets--;

     //You really shouldn't use GameObject.Find - it's slow
     //Tag your object and use GameObject.FindWithTag() in stead
     //Better still, since the object doesn't change store a reference to it
     //GameObject.Find("bullet_count").guiText.text = ""+totalBullets;
     bulletCounter.text = ""+totalBullets;
 }

}

function Reload() { if(Input.GetButtonDown("Reload")) { yield WaitForSeconds(reloadTime); if(totalBullets > 0) { var transfer : int = bulletsPerClip - bullets;

         if(transfer > totalBullets) transfer = totalBullets; 

         bullets += transfer;
         totalBullets -= transfer;
     }
 }

}