Rotating an Object on Key Press!

Hello, I am new to JavaScript but I would like to know how to rotate an object on its X axis using the A-key (rotate left) and the D-key (rotate right).

Can anyone please input a working JavaScript code that will allow an object to rotate using these keys?

Much appreciated!

Here is a quick script. Attach it to any object. Note it rotates around Y axis (since you mentioned left and right). If you really want the X axis, replace Vector3.up with Vector3.right.

var speed = 30;

function Update () {

 if (Input.GetKey(KeyCode.A))
 	transform.Rotate(Vector3.up * speed * Time.deltaTime);
 	
 if (Input.GetKey(KeyCode.D))
 	transform.Rotate(-Vector3.up * speed * Time.deltaTime);

}

correct script:

#pragma strict

var velocidade = 30;

function Start () {

}

function Update () {

	if (Input.GetKey(KeyCode.A)){
      transform.Rotate(Vector3.up * velocidade * Time.deltaTime);
      
    }
      
	if (Input.GetKey(KeyCode.D)){
      transform.Rotate(-Vector3.up * velocidade * Time.deltaTime);
 
	}

}

‘Function’ isn’t working, how do I fix this?