countdown & bg changer

countdown.js

$(function () {

	var main = [];
	var colors = ['#19ba5a', '#3c82f6', '#e93750', '#29353a', '#9449b3', '#ffdb00'];
	var interval_time = 5000;
	$('.main').each(function () {
		main.push($(this).prop('id'));
	});
	var body = $('body');

	function randomNumber (max) {
		return Math.floor(Math.random() * max);
	}

	var count = randomNumber(main.length)

	// set body class and color the first time
	body.removeClass().addClass(main[count]);
	var colorCount = randomNumber(colors.length);
	body.css('background-color', colors[colorCount]);

	function changeMain () {
		count++;
		if (count == main.length) {
			count = 0;
		}
		var current = body.prop('class');
		body.removeClass().addClass(current + ' ' + main[count]);

		var newColor;
		do {
			newColor = randomNumber(colors.length)
		} while (newColor == colorCount);
		colorCount = newColor;

		body.css('background-color', colors[colorCount]);
		setTimeout(function () {
			body.removeClass(current)
		}, 500);
	}

	setInterval(function () {
		changeMain();
	}, interval_time);



	var one_day = 60 * 60 * 24;
	var one_hour = 60 * 60;
	var one_minute = 60;
	var one_second = 1;

	function countDown () {

		// time difference
		var difference = from - to;

		// get days
		var days = Math.floor(difference / one_day);

		// get hours
		var hours = Math.floor((difference % one_day) / one_hour);
		if (hours < 10) {
			hours = '0' + hours;
		}

		// get minutes
		var minutes = Math.floor((difference % one_hour) / one_minute);
		if (minutes < 10) {
			minutes = '0' + minutes;
		}

		// get minutes
		var seconds = difference % one_minute;
		if (seconds < 10) {
			seconds = '0' + seconds;
		}

		var line1 = '<strong>' + days + '</strong> days';
		var line2 = '<strong>' + hours + '</strong>:<strong>' + minutes + '</strong>:<strong>' + seconds + '</strong>';

		$('#countdown .days').html(line1);
		$('#countdown .time').html(line2);

		if (minutes == 0 && seconds == 0) {
			location.reload(); 
		}

		// count up to time
		to++;

		var total = from - start;
		var part = to - start;

		$('#bar').css('width', part / total * 100 + '%');

	}

	countDown();

	setInterval(function () {

		countDown();
		
	}, 1000);

});