anchor.diff:  ''')
   
   class Clock{
  -  int startAt = (25*60);
  -  String counter='25:00';
  +
  +  int startAt;
  +  String durationBreak;
  +  String counter;
     Stopwatch watch = new Stopwatch();
     Timer timer;
  +
  +  Clock(){
  +    startAt = (25*60);
  +    durationBreak = prettyPrintTime(5);
  +    counter= prettyPrintTime(25);
  +  }
     
     void start() {
       watch.start();
  
positive.code:   }
  
    void setStartTime(string at){
      print(at);
      var value = int.parse(at, onError: (source) => null);
      if (value != null){
        startAt = value*60;
      }
    }
  
  }
negative.code: 
  @View(template: '''
  <p>Clock: <i>{{ counter }}</i></p>
  <p>Break duration: <i>{{ durationBreak }}</i></p>
  <p>Duration of pomodoro: 
  <input #userstartat>
  <button (click)="setStartTime(userstartat.value)">set</button>
  </p>
  <p>Duration of break: 
  <input #durationbreak>
  <button (click)="setDurationBreak(durationbreak.value)">set</button>
  </p>
  <button (click)="start()">Start</button>
  <button (click)="stop()">Stop</button>
  