Update() can not be a coroutine

Hey! This is the script:

 #pragma strict
 
 var Sound : AudioClip;
 var coll: Collider;
 
 function Start() {
     coll = GetComponent.<Collider>();
 }
 
 function Update(){
     // Move this object to the position clicked by the mouse.
     if (Input.GetMouseButtonDown(0)) {
         var ray : Ray = Camera.main.ScreenPointToRay(Input.mousePosition);
         var hit : RaycastHit;
         
         if (coll.Raycast(ray, hit, 100.0)) {
                      GetComponent.<AudioSource>().PlayOneShot(Sound);
                      }
                      {
         yield WaitForSeconds (1);
         }
         {
                      Application.LoadLevel("EasterEggThingy");
             transform.position = ray.GetPoint(100.0);
         }
     }
 }

I have tried the other solutions from other questions but I just can't fix it. Can someone help me with this code?