var cube : GameObject;

function Start () {
    for ( var i = 2; i < 1000 ; i++)

    Instantiate(    //One of Code, expanded over multiple lines for newb reading.
        cube,
        Vector3(
            Random.Range(0,4),
            i/3.0,
            Random.Range(0,4)
        ),
        Quaternion.identity
    );
}