system time using Bacon.js (http://jsbin.com/kigulex/4/edit?js,output)

systemtime.js

((global,Bacon)=> {
  const pollingInterval = 1000;
  const getCurrentDateAndTime = ()=> new Bacon.Next(new Date());
  const getTime = (currentDate)=> ({
    hour: currentDate.getHours ( ),
    minutes: currentMinutes = currentDate.getMinutes ( ),
    seconds: currentDate.getSeconds ( )
  });
  const convertMinutesAndSeconds = (currentTime)=> ({
    hour : currentTime.hour,
    minutes: (currentTime.minutes < 10 ? '0' : '') + currentTime.minutes,
     seconds: (currentTime.seconds < 10 ? '0' : '') + currentTime.seconds
  });
  const convertHourAndTimeOfDay = (currentTime)=> {
    const timeOfDay = currentTime.hour < 12 ? 'AM' : 'PM';
    let convertedHour = currentTime.hour;
    if(currentTime.hour > 12) convertedHour = currentTime.hour - 12;
    if(currentTime.hour === 0 ) convertedHour = 12;
    return {
      hour: convertedHour,
      minutes: currentTime.minutes,
      seconds: currentTime.seconds,
      timeOfDay: timeOfDay
    };
  };
  const convertToDisplayTime = (currentTime)=> `${currentTime.hour}:${currentTime.minutes}:${currentTime.seconds} ${currentTime.timeOfDay}`;
  
  const renderTimeToDom = (displayTime)=> global.document.querySelector('body').innerHTML = displayTime;

  Bacon.fromPoll(pollingInterval,getCurrentDateAndTime)
    .map(getTime)
    .map(convertMinutesAndSeconds)
    .map(convertHourAndTimeOfDay)
    .map(convertToDisplayTime)
    .onValue(renderTimeToDom);
  })(window,Bacon)