HOW TO INSTANTIATE IMAGE INSIDE CANVAS?

 void start(){
         InvokeRepeating ("starta",2, 2);
     }
     void starta(){
         float x = Random.Range(-220f, 126f);
         Vector3 da = new Vector3 (x,0,0);
         GameObject s=Instantiate (canvas,transform.position,canvas.transform.rotation)as GameObject;
         GameObject ss=Instantiate (imahe, da, Quaternion.identity)as GameObject;
         ss.transform.SetParent(s.transform,false);
     }