!7

p-experiment {
  autoRestart();
  new Map<S, Long> latestAppearance;
  Set<S> last = null;
  repeat with sleep 1 {
    long time = sysNow();
    Set<S> things = thingsOnScreen();
    for (S s : setMinusSet(things, last)) latestAppearance.put(s, sysNow());
    last = things;
    L<S> list = sortedByMapLookupDesc(things, latestAppearance);
    done2_always(time, "Found: " + list);
    consoleTitle(l(elements) + " " + joinWithComma(list));
  }
}