anchor.diff:        _isStart = false;
       } else {
         Console.moveCursorBack(_lastMsg.length);
  -      var msg = "(${(_watch.elapsed.inMilliseconds / 1000).toStringAsFixed(2)}s)";
  +      var msg = "(${(_watch.elapsed.inMilliseconds / 1000).toStringAsFixed(place)}s)";
         _lastMsg = msg;
         Console.setBold(true);
         Console.write(msg);
  
positive.code:   
    TimeDisplay();
    
    void start() {
      stdin.echoMode = false;
      _watch = new Stopwatch();
      _updateTimer = new Timer.periodic(new Duration(milliseconds: 50), (timer) {
        update();
      });
      _watch.start();
    }
  
negative.code:     _updateTimer.cancel();
    }
    
    void update([int place = 1]) {
      if (_isStart) {
        var msg = "(${_watch.elapsed.inSeconds}s)";
        _lastMsg = msg;
  