why ';' expected ?

• Unity said me to add ';' on line : GameObject mapiece = Instantiate(block, pos, Quaternion.identity) as GameObject;

• I don't understand why, he want just after first GameObject.

• i try to make all my instantiate "block" child of prefab "piece" that make it.

    private var PieceLargeurTaille : int;
       private var PieceLongueurTaille : int;
       //public var block: Transform;
       var piece : GameObject;
       var block : GameObject;
       var spacing = 2.0;
       
       function Start () {
       
           PieceLargeurTaille = Random.Range(4,8);  
           PieceLongueurTaille = Random.Range(5,8); 
       
           for (var y = 0; y < PieceLargeurTaille; y++) {
               for (var x=0;x<PieceLongueurTaille;x++) {
                   var pos = Vector3 (x, 0, y) * spacing;
                   // Instantiate(block, pos, Quaternion.identity);
                   GameObject mapiece = Instantiate(block, pos, Quaternion.identity) as GameObject;
                   mapiece.transform.parent = transform;
               }
           }
       }
  
  
  

Thanks