QStateMachine machine;
    QState *s1 = new QState();
    QState *s2 = new QState();
    QState *s3 = new QState();

    s1->addTransition(button, SIGNAL(OnEntry()), s2);
    s2->addTransition(button, SIGNAL(OnEntry()), s3);
    s3->addTransition(button, SIGNAL(OnEntry()), s1);