text: 
  var App = React.createClass({
      render: function() {
          return (
              <div>
                  <h3>dynamic</h3>
                  <x-clock>10:10:30</x-clock>
                  <h3>fixed</h3>
                  <x-clock hour="10" minute="10" second="30">10:10:30</x-clock>
              </div>
          )
      }
  })
  
  ReactDOM.render(<App />, document.body)
  