"use strict";
// Countdown js
const second = 1000,
    minute = second * 60,
    hour = minute * 60,
    day = hour * 24;

var countDown = new Date('Sep 30, 2018 00:00:00').getTime(),
    x = setInterval(function() {

        var now = new Date().getTime(),
            distance = countDown - now;

            document.getElementById('days').innerText = Math.floor(distance / (day)),
            document.getElementById('hours').innerText = Math.floor((distance % (day)) / (hour)),
            document.getElementById('minutes').innerText = Math.floor((distance % (hour)) / (minute)),
            document.getElementById('seconds').innerText = Math.floor((distance % (minute)) / second);

    }, second);