How to make my flashlight move with the mouse movement?

I have attached the light to the camera and works great but I won't the chapter to have control where they shine the light by using the mouse.

How do I do this?

At the moment the light just follows the camera and there is little control.

Heres my script:

function Update () {

if (Input.GetKeyDown("f")) {

   if (GetComponent.<Light>().enabled == true)
       GetComponent.<Light>().enabled = false;
       else
       
       GetComponent.<Light>().enabled = true;
       }

}

Thnx

p.s: I'm in a 3D scene using first person.