Open edit no reset

How to go to another EDIT screen and do not reset the countdown time
Here is my code:

    @Subscribe
    protected void onInit(InitEvent event) {
        ScreenOptions screenOptions = event.getOptions();
        if (screenOptions instanceof MapScreenOptions) {
            Map<String, Object> queryParams = ((MapScreenOptions) screenOptions).getParams();
            count = (int) queryParams.get("count");

        }



        minute = countdowntime / 60;
        second = countdowntime%60;
    }

    int count = 0;
    int countdowntime = 63;
    int second = 0;
    int minute =0;
    private void demNguoc() {
        BackgroundTask<Integer, Void> task = new BackgroundTask<Integer, Void>(countdowntime, this) {
            @Override
            public Void run(TaskLifeCycle<Integer> taskLifeCycle) throws InterruptedException {
                Thread.sleep(1000);
                return null;
            }

            @Override
            public void done(Void result) {
                super.done(result);
                thoigianlambaiLabel.setValue(minute + ":" + second);
                if (second == 0) {
                    second = 60;
                    minute--;
                }
                if (minute < 0) {
                    thoigianlambaiLabel.setValue(00 + ":" + 00);
                    minute = 0;
                    second = 0;
                } else {
                    second--;
                    demNguoc();
                }
            }
        };
        taskHandler = backgroundWorker.handle(task);
        taskHandler.execute();
    }