!7

p-exp {
  Thread thread = startThread(r {
    while (true) {
      busySleepSeconds_noPing(1);
      ping();
    }
  });
  thread {
    sleep(random(3000));
    printWithMS("Cancelling thread");
    cancelThreadAndWait(thread);
    printWithMS("Cancelled thread");
  }
  repeat 20 {
    print("State: " + thread.getState());
    sleepSeconds(1/3.0);
  }
}