// it returns time every second

 Stream<String> getTime() {

      return Stream.periodic(

          const Duration(seconds: 1), (_) => DateTime.now().toIso8601String());

    }

​

// just a random number generator, also yield every 2 seconds

    Stream<int> generateNumbers = (() async* {

      await Future<void>.delayed(const Duration(seconds: 2));

      for (int i = 0; i < 100; i++) {

        int randomNumber = Random().nextInt(150);

        yield randomNumber;

      }

    })();

0

​