content: 'use strict';
  
  import React from 'react';
  
  class CountdownTimer extends React.Component {
  
      constructor(props) {
          super(props);
      }
  
      render() {
          return (
              <div>
                <span type='text'>TODO: the number to be counted</span>
                <button>
                  Start
                </button>
              </div>
              );
      }
  }
  
  CountdownTimer.propTypes = {
      start: React.PropTypes.number
  };
  
  module.exports = CountdownTimer;
  