package music;
interface Event {
  public void play();
}
class Note implements Event {
  int d;
  double f;
  public Note(int duration, double factor) {
    this.d = duration;
    this.f = factor;
  }
  public void play() {
    Music.scalePitch(f);
    Music.play(d);
    Music.scalePitch(1.0/f);
  }
}
class Rest implements Event {
  int d;
  public Rest(int duration) {
    d = duration;
  }
  public void play() {
    Music.rest(d);
  }
}