title: Create a simple timer to count seconds, minutes and hours
body: <p>I'm trying to create a pretty simple program that basically is a timer. 
  I have three sets of labels, <code>lbl_seconds</code>, <code>lbl_minutes</code> and <code>lbl_hours</code>.
  These labels have the default value of <code>00:00</code> and I want the timer to change that for each label. I have googled this but I cannot seem to find any good info on it. </p>
  
  <p>Do I need three separate timers? I have also noticed that the timers have their own tick event handler. I guess it's in this that I need to change the value of the label. How to do just that?</p>