Why this script dont work properly? any ide to fix it?

Hey i need help with creating script. I have isometric camera and i have script that allow me moving it and zooming in/out but i need something that allow me rotating it by 45 degree when i click left or right arrow and 30 degree when i click up button (and of course backing to previous position when i click down arrow) any idea how it should look? thank 4 all help

function Update () {

/////////////////////

//keyboard rotate

var translationX : float = Input.GetAxis("Horizontal");

var translationY : float = Input.GetAxis("Vertical");

var fastTranslationX : float = 2 * Input.GetAxis("Horizontal");

var fastTranslationY : float = 2 * Input.GetAxis("Vertical");

if (target) {

x += Input.GetAxis("Right") xSpeed 0.02;

y -= Input.GetAxis("Up") ySpeed 0.02;

y = ClampAngle(y, yMinLimit, yMaxLimit);

var rotation = Quaternion.Euler(y, x, 0);

var position = rotation * Vector3(0.0, 0.0, -distance) + target.position;

}

////////////////////

//mouse scrolling

var mousePosX = Input.mousePosition.x;

var mousePosY = Input.mousePosition.y;

var scrollDistance : int = 5;

var scrollSpeed : float = 70;

//Horizontal camera movement

if (mousePosX < scrollDistance)

//horizontal, left

{

transform.Translate(-1, 0, 1);

}

if (mousePosX >= Screen.width - scrollDistance)

//horizontal, right

{

transform.Translate(1, 0, -1);

}

//Vertical camera movement

if (mousePosY < scrollDistance)

//scrolling down

{

transform.Translate(-1, 0, -1);

}

if (mousePosY >= Screen.height - scrollDistance)

//scrolling up

{

transform.Translate(1, 0, 1);

}

////////////////////

//zooming

var Eye : GameObject = GameObject.Find("Eye");

//

if (Input.GetAxis("Mouse ScrollWheel")

0 && Eye.camera.orthographicSize > 4)

{

Eye.camera.orthographicSize = Eye.camera.orthographicSize - 4;

}

//

if (Input.GetAxis("Mouse ScrollWheel") < 0 && Eye.camera.orthographicSize < 80)

{

Eye.camera.orthographicSize = Eye.camera.orthographicSize + 4;

}

//default zoom

if (Input.GetKeyDown(KeyCode.Mouse2))

{

Eye.camera.orthographicSize = 50;

}