Creating 4 objects going in all 4 directions?

So I'm working on the script for my game and for the game im trying to make it to were you control an "Exploder" and you press f and it creates 4 explosion balls so to say. But i have no clue on how to make them go different directions. Do I just rotate the Empty object or is there a Vector3 command to make it go left.. Heres my script so far

var fireballprefab: Transform;
var mainball: Transform;
var fireballspeed = 2000;
var fireballprefab2: Transform;
var fireballprefab3: Transform;
var fireballprefab4: Transform;
var firebutton = "f";

function Update ()

              var fireball = Instantiate(fireballprefab, gameObject.Find("ballcreation").transform.position, Quaternion.identity);
            fireball.rigidbody.AddForce(transform.forward * fireballspeed);
              var fireball2 = Instantiate(fireballprefab2, gameObject.Find("ballcreation2").transform.position, Quaternion.identity);
            fireball2.rigidbody.AddForce(transform.forward * fireballspeed);
              var fireball3 = Instantiate(fireballprefab3, gameObject.Find("ballcreation3").transform.position, Quaternion.identity);
            fireball3.rigidbody.AddForce(transform.right * fireballspeed);
              var fireball4 = Instantiate(fireballprefab4, gameObject.Find("ballcreation4").transform.position, Quaternion.identity);
            fireball4.rigidbody.AddForce(transform.left * fireballspeed);


Turns out that left is: `transform.right*-1` or just `-transform.right`. Likewise, backwards is `-transform.forward`

If you want to mess with other directions, you can add whatever you like and then use Normalize to chop it down to length 1. About 30 degrees forwards right is: `((transform.forward*2+transform.right).normalized)*speed`.

`Vector3.right`, and so on, work the same way, except they give world movement: East, north ...