Unknown Identifier?

How is that possible? Line: 35 Unknown Identifier "scriptCircles"

 // Player Script
 
 // Inspector Variables
 var tagName : String;                        //allow the designer to setup a tag in the inspector
 var rayDistance : float = 0;                //length of the ray for out raycast
 var score : int = 0;                            //score for our player
 var gameTime : float = 5;                  //amount of time the game will last
 var loadWaitTime : float = 3.0;
 var numberOfPointsToWin : int = 5;    //amount of points needed to win
 
 // Private Variables
 
 // 
 function Start()
 {
     InvokeRepeating("CountDown", 1.0, 1.0);        // Repeat the countdown every second
 }
 // Update is called every frame
 function Update () 
 {
     // use the mouse button to select onGO in the scene
     if (Input.GetMouseButtonDown(0))
     {
         audio.Play();
         var hit : RaycastHit;
         var ray : Ray = Camera.main.ScreenPointToRay(Input.mousePosition);        // get mouse position
         if (Physics.Raycast (ray, hit, rayDistance))
         {
             if (hit.transform.tag == tagName)
             {
                 //var position = Vector3 (Random.Range(-6,6),Random.Range(-4,4),0);        // new random position for the gameObject
                 //hit.transform.position = position;        // move the gameObject to a random position
                 var enemyScript = hit.transform.GetComponent(scriptEnemy);
                 enemyScript.numberOfClicks -= 1;
                 var circlesScript = hit.transform.GetComponent(scriptCircles);
                 circlesScript.numberOfClicks -= 1;
                 if(enemyScript.numberOfClicks == 0)
                 {
                     score += enemyScript.enemyPoints;
                 }
                 //if(circlesScript.numberOfClicks == 0)
                 //{
                 //    score += circlesScript.enemyPoints;
                 //}
             }
         }
     }
 }
 
 function CountDown()
 {
     if (--gameTime == 0)        // subtract from gametime
     {
         CancelInvoke("CountDown");        // cancell the countdown
         //yield WaitForSeconds (loadWaitTime);
         if (score >= numberOfPointsToWin)
         {
             Application.LoadLevel ("sceneScreenWin");
         }
         else
         {
             Application.LoadLevel ("sceneScreenLose");
         }
     }
 }
 //
 function OnGUI()
 {
     GUI.Label (Rect(10,10,100,20), "Score: " + score);
     GUI.Label (Rect(10,25,100,35), "Time: " + gameTime);
 }