function showCountDown () {
  var nextdate  = new Date(2017, 9, 24, 10)
  var curDate = new Date()
  var seconds, minutes, hours

  seconds = Math.floor((nextdate - curDate) / 1000)
  minutes = Math.floor(seconds / 60 )
  seconds = seconds % 60
  hours = Math.floor(minutes/60)
  minutes = minutes % 60;

  console.log(hours + ':' + minutes + ':' + seconds)
}

var interval = setInterval(showCountDown, 1000)