Aim down sights ( javascript )

So i have my own javascript on the scope effect ( zooming in ) , but i want to play an animation or by code to look down the sights if my FOV has increased.

 public var Aim : boolean = false;
 public var deffFOV : float;
 public var CAM : GameObject;
 
 function Start () {
      deffFOV = CAM.camera.fieldOfView;             
 }                                                     
                                    
                                                                      
 function Update () {
     if(Input.GetMouseButtonDown(1)){
         Aim = true;
     }
 
     if(Input.GetMouseButtonUp(1)){
         Aim = false;
     }
     
     if(Aim) {
         CAM.camera.fieldOfView = Mathf.Lerp(CAM.camera.fieldOfView, FOVIN , FOVspeed * Time.deltaTime);
     }
     
     if(!Aim){
         CAM.camera.fieldOfView = Mathf.Lerp(CAM.camera.fieldOfView , deffFOV , FOVspeed * Time.deltaTime);
     }
 }

EDIT (MOD): It seriously doesn't take more than 2 minutes to fix up the code. Please do so yourself next time you're asked to :)