ERROR BCE0043 i need help pls

hi, i try to do a javascript for a animated door but when i go to put the scrypt in my project to can animate the door in the game, this error appears "Type ´doorscript1´ already has definition for ´distToOpen" i don`t know to do, help pls, my script:

var open: boolean = false;

var openAnimationString : String;

var closeAnimationString : String;

var buttonTransform : Transform;

var distToOpen : float = 4;

@HideInInspector

var playerTransform : Transform;

var distToOpen : float = 4;

@HideInInspector

var cameraTransform : Transform;

var openSound : AudioClip;

var closeSound : AudioClip;

function Awake ()

{

 playerTransform =

GameObject.FindWithTag("Player").Transform; cameraTransform = GameObject.FindWithTag("MainCamera").Transform; if (open)

     animation.Play(openAnimationString);

}

function Update ()

{

 var alreadyChecked : boolean = flase;

 var angle : float =

Vector3.Angle(buttonTransform.position - cameraTransform.position, buttonTransform.position + (cameraTransform.right * buttonTransform.localScale.magnitude) - cameraTransform.position);

 if

(Vector3.Distance(playerTransform.position, buttonTransform.position) <= distToOpen)

 if

(Vector3.Angle(buttonTransform.position - cameraTransform.position, cameraTransform.forward) <= angle)

     if (Input.GetButtonDown("Use Key") && !animation.isPlaying)

     {

         if (open)

         {

             animation.Play(closeAnimationString);

             open = false;

             alreadyChecked = true;

             if(closeSound)

                 audio.PlayOneShot(closeSound);

         }

         if(!open && !alreadyChecked)

         {

             animation.Play(openAnimationString);

             open = true;

             if (openSound)

                 audio.PlayOneShot(openSound);

         }

     }

}