instantiate object after som e time unity

 //Javascript requires something different .. // read on IEnumerators if you don't understand.  public IEnumerator DoDelay(float seconds, System.Action callback) {   yield return new WaitForSeconds(seconds);   callback(); }  public void MyCallBack() {    //this gets called when DoDelay is ready. can instantiate here or whatever. } void StartDelay() { //call this in your calling function...    StartCoroutine(DoDelay(3.0f,MyCallBack));    }