Create Observable using timer method in RxJava

After the specified time, this reactive source signals a single 0L (then completes for Flowable and Observable).

Observable<Long> eggTimer = Observable.timer(5, TimeUnit.MINUTES);

eggTimer.blockingSubscribe(v -> System.out.println("Egg is ready!"));

Refereneces
https://github.com/ReactiveX/RxJava/wiki/Creating-Observables#timer
http://reactivex.io/documentation/operators/timer.html