public void eyeTracking(FirebaseVisionFace face){

        final boolean right_eye = face.getRightEyeOpenProbability() < 0.5;
        final boolean left_eye =  face.getLeftEyeOpenProbability() < 0.5;

        final long start = System.currentTimeMillis();
        Log.d(TAG, "TimeA: " + start);

        if (right_eye && left_eye) {

            new CountDownTimer(5000, 1000) {

                public void onTick(long millisUntilFinished) {


                }

                public void onFinish() {
                    long end = System.currentTimeMillis();
                    Log.d(TAG, "TimeB: " + end);
                    if(end - start >= 5000){
                        if (right_eye && left_eye) {
                            alertBox();
                        }
                    }

                }
            }.start();
        }
   }