!747

m {

  static volatile long beatCount;

  static volatile int delay = 1000;

  static long booted;

  static volatile boolean loud;

  p {

    booted = now();

    readLocally("beatCount");

    makeAndroid3("Heart.");

    print("Beating at 1/" + delay + " ms...");

    while (true) {

      if (loud)

        print("beep!");

      ++beatCount;

      saveLocally("beatCount");

      sleep(delay);

    }

  }

  static synchronized S answer(S s, L<S> history) {

    if (match3("get beat count", s))

      return "" + beatCount;

    if (match3("get delay", s))

      return "" + delay;

    if (match3("booted when", s))

      return "" + booted;

    return null;

  }

}