sclass RandomScreenScan {
  int w, h;
  transient Rect lastSent;
  transient int stayMax;
  
  *() {}
  *(int *w, int *h) {}
  
  Rect get(bool foundSomething) {
    ping();
    if (foundSomething && lastSent != null && stayMax++ < 10) ret lastSent;
    stayMax = 0;
    lastSent = randomScreenRect(w, h);
    print("Screen scan: " + lastSent);
    ret lastSent;
  }
}