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              <div class="cont">
	<div class="slider"></div>
	<ul class="nav"></div>
	<div data-target='right' class="side-nav side-nav--right"></div>
	<div data-target='left' class="side-nav side-nav--left"></div>
</div>
            
          
!
            
              $bgClr: rgba(#0b0f27, .83);
$txtClr: #fff;
$animSpd: 750 * 1ms; // Change also in JS

$numOfSlides: 5; // Add new city in the array in JS and a new image below

$bgPics: (
url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/537051/city--1-min-min.jpg') center center no-repeat,
url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/537051/city--2-min-min.jpg') center center no-repeat,	url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/537051/city--3-min-min.jpg') center center no-repeat,
url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/537051/city--4-min-min.jpg') center center no-repeat,
url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/537051/city--5-min-min.jpg') center center no-repeat
);

@mixin mediaMaxW($width) {
  @media screen and (max-width: $width) {
    @content;
  }
}

.cont {
	position: relative;
	height: 100vh;
	overflow: hidden;
}

.slider {
	position: relative;
	height: 100%;
	transform: translate3d(0, 0, 0);
	will-change: transform;
	cursor: all-scroll;
	user-select: none;

	&.animation {
		transition: transform $animSpd ease-in-out;

		.slide__darkbg {
			transition: transform $animSpd ease-in-out;
		}
		
		.slide__text {
			transition: transform $animSpd ease-in-out;
		}
		
		.slide__letter {
			transition: transform $animSpd ease-in-out;
		}
	}
}

.slide {
	position: absolute;
	top: 0;
	width: 100%;
	height: 100%;
	overflow: hidden;
	
	@for $i from 1 through $numOfSlides {
		&--#{$i} {
			left: 100% * ($i - 1);
		}
	}
	
	&__darkbg {
		position: absolute;
		width: 100%;
		height: 100%;
		top: 0;
		left: 0;
		transform: translate3d(0, 0, 0);
		will-change: transform;
		z-index: 10;
	}
	
	&__text-wrapper {
		position: absolute;
		display: flex;
		justify-content: center;
		align-items: center;
		width: 100%;
		height: 100%;
		z-index: 15;
	}
	
	&__letter {
		position: absolute;
		display: flex;
		align-items: center;
		justify-content: center;
		top: 0;
		left: 0;
		width: 100%;
		height: 100%;
		transform: translate3d(0, 0, 0);
		-webkit-text-fill-color: transparent !important;
		-webkit-background-clip: text !important;
		font: {
			size: 50vw;;
			weight: 800;
		}
		color: #000;
		z-index: 2;
		will-change: transform;
		user-select: none;
	}
	
	&__text {
		font: {
			size: 8vw;
			weight: 800;
		}
		text-transform: uppercase;
		transform: translate3d(0, 0, 0);
		letter-spacing: 12px;
		color: $txtClr;
		will-change: transform;
		user-select: none;
	}
	&__text:nth-child(odd) {
		z-index: 2;
	}
	&__text:nth-child(even) {
		z-index: 1;
	}
		
	@each $item in $bgPics {
		$i: index($bgPics, $item);
		&--#{$i} {
			&__darkbg {
				left: -50% * ($i - 1);
				background: $item;
				background-size: cover;
				background-position: 0px center, 0px center;
				transform: translate3d(0, 0, 0);
				will-change: transform;
				&:after {
					content: '';
					position: absolute;
					top: 0;
					left: 0;
					width: 100%;
					height: 100%;
					background-color: $bgClr;
				}
			}
			&__letter {
				background: $item;
				background-position: 0px center, 0px center;
				background-size: cover;
			}
		}
	}
}

.nav {
	position: absolute;
	bottom: 25px;
	left: 50%;
	transform: translateX(-50%);
	list-style-type: none;
	z-index: 10;
	
	&__slide {
		position: relative;
		display: inline-block;
		width: 28px;
		height: 28px;
		border-radius: 50%;
		border: 2px solid #fff;
		margin-left: 10px;
		cursor: pointer;
		@include mediaMaxW(400px) {
			width: 22px;
			height: 22px;
		}
		&:hover:after {
			transform: translate(-50%, -50%) scale(1,1);
			opacity: 1;
		}
		
		&:after {
			content: '';
			position: absolute;
			top: 50%;
			left: 50%;
			transform: translate(-50%, -50%) scale(0,0);
			width: 75%;
			height: 75%;
			border-radius: 50%;
			background-color: #fff;
			opacity: 0;
			transition: 300ms;
		}
		
		&--1 {
			margin-left: 0;
		}
	}
}

.nav-active {
	&:after {
		transform: translate(-50%, -50%) scale(1,1);
		opacity: 1;
	}
}

.side-nav {
	position: absolute;
	width: 10%;
	height: 100%;
	top: 0;
	z-index: 20;
	cursor: pointer;
	opacity: 0;
	transition: 300ms;
	
	&:hover {
		opacity: .1;
	}
	
	&--right {
		right: 0;
		background-image: linear-gradient(to right, rgba(255, 255, 255, 0) 0%, rgb(238, 215, 255) 100%);
	}
	&--left {
		left: 0;
		background-image: linear-gradient(to left, rgba(255, 255, 255, 0) 0%, rgb(238, 215, 255) 100%);
	}
}

html {
  box-sizing: border-box;
	font: {
		family: 'Open Sans', sans-serif;
	}
}

*, *:before, *:after {
  box-sizing: inherit;
  margin: 0; padding: 0;
}

body {
	background-color: #000;
	overflow: hidden;
}
            
          
!
            
              $(document).ready(function() {
	const $cont = $('.cont');
	const $slider = $('.slider');
	const $nav = $('.nav');
	const winW = $(window).width();
	const animSpd = 750; // Change also in CSS
	const distOfLetGo = winW * 0.2;
	let curSlide = 1;
	let animation = false;
	let diff = 0;
	
	// Generating slides
	let arrCities = ['Amsterdam', 'Rome', 'New—York', 'Singapore', 'Prague']; // Change number of slides in CSS also
	let numOfCities = arrCities.length;
	let arrCitiesDivided = [];

	arrCities.map((city) => {
		let length = city.length;
		let letters = Math.floor(length / 4);
		let exp = new RegExp(".{1," + letters + "}", "g");
		
		arrCitiesDivided.push(city.match(exp));
	});
	
	let generateSlide = function(city) {
		let frag1 = $(document.createDocumentFragment());
		let frag2 = $(document.createDocumentFragment());
		const numSlide = arrCities.indexOf(arrCities[city]) + 1;
		const firstLetter = arrCitiesDivided[city][0].charAt(0);

		const $slide =
					$(`<div data-target="${numSlide}" class="slide slide--${numSlide}">
							<div class="slide__darkbg slide--${numSlide}__darkbg"></div>
							<div class="slide__text-wrapper slide--${numSlide}__text-wrapper"></div>
						</div>`);

		const letter = 
					$(`<div class="slide__letter slide--${numSlide}__letter">
							${firstLetter}
						</div>`);

		for (let i = 0, length = arrCitiesDivided[city].length; i < length; i++) {
			const text = 
						$(`<div class="slide__text slide__text--${i + 1}">
								${arrCitiesDivided[city][i]}
							</div>`);
			frag1.append(text);
		}

		const navSlide = $(`<li data-target="${numSlide}" class="nav__slide nav__slide--${numSlide}"></li>`);
		frag2.append(navSlide);
		$nav.append(frag2);

		$slide.find(`.slide--${numSlide}__text-wrapper`).append(letter).append(frag1);
		$slider.append($slide);

		if (arrCities[city].length <= 4) {
			$('.slide--'+ numSlide).find('.slide__text').css("font-size", "12vw");
		}
	};

	for (let i = 0, length = numOfCities; i < length; i++) {
		generateSlide(i);
	}

	$('.nav__slide--1').addClass('nav-active');

	// Navigation
	function bullets(dir) {
		$('.nav__slide--' + curSlide).removeClass('nav-active');
		$('.nav__slide--' + dir).addClass('nav-active');
	}
	
	function timeout() {
		animation = false;
	}
	
	function pagination(direction) {
		animation = true;
		diff = 0;
		$slider.addClass('animation');
		$slider.css({
			'transform': 'translate3d(-' + ((curSlide - direction) * 100) + '%, 0, 0)'
		});
		
		$slider.find('.slide__darkbg').css({
				'transform': 'translate3d(' + ((curSlide - direction) * 50) + '%, 0, 0)'
		});
		
		$slider.find('.slide__letter').css({
				'transform': 'translate3d(0, 0, 0)',
		});
		
		$slider.find('.slide__text').css({
			'transform': 'translate3d(0, 0, 0)'
		});
	}
	
	function navigateRight() {
		if (curSlide >= numOfCities) return;
		pagination(0);
		setTimeout(timeout, animSpd);
		bullets(curSlide + 1);
		curSlide++;
	}

	function navigateLeft() {
		if (curSlide <= 1) return;
		pagination(2);
		setTimeout(timeout, animSpd);
		bullets(curSlide - 1);
		curSlide--;
	}

	function toDefault() {
		pagination(1);
		setTimeout(timeout, animSpd);
	}

	// Events
	$(document).on('mousedown touchstart', '.slide', function(e) {
		if (animation) return;
		let target = +$(this).attr('data-target');
		let startX = e.pageX || e.originalEvent.touches[0].pageX;
		$slider.removeClass('animation');
		
		$(document).on('mousemove touchmove', function(e) {
			let x = e.pageX || e.originalEvent.touches[0].pageX;
			diff = startX - x;
			if (target === 1 && diff < 0 || target === numOfCities && diff > 0) return;
			
			$slider.css({
				'transform': 'translate3d(-' + ((curSlide - 1) * 100 + (diff / 30)) + '%, 0, 0)'
			});
			
			$slider.find('.slide__darkbg').css({
				'transform': 'translate3d(' + ((curSlide - 1) * 50 + (diff / 60)) + '%, 0, 0)'
			});
			
			$slider.find('.slide__letter').css({
				'transform': 'translate3d(' +  (diff / 60) + 'vw, 0, 0)',
			});
			
			$slider.find('.slide__text').css({
				'transform': 'translate3d(' + (diff / 15) + 'px, 0, 0)'
			});
		})	
	})
	
	$(document).on('mouseup touchend', function(e) {
		$(document).off('mousemove touchmove');
		
		if (animation) return;
		
		if (diff >= distOfLetGo) {
			navigateRight();
		} else if (diff <= -distOfLetGo) {
			navigateLeft();
		} else {
			toDefault();
		}
	});
	
	$(document).on('click', '.nav__slide:not(.nav-active)', function() {
		let target = +$(this).attr('data-target');
		bullets(target);
		curSlide = target;
		pagination(1);
	});	
	
	$(document).on('click', '.side-nav', function() {
		let target = $(this).attr('data-target');
		
		if (target === 'right') navigateRight();
		if (target === 'left') navigateLeft();
	});
	
	$(document).on('keydown', function(e) {
		if (e.which === 39) navigateRight();
		if (e.which === 37) navigateLeft();
	});
	
	$(document).on('mousewheel DOMMouseScroll', function(e) {
		if (animation) return;
    let delta = e.originalEvent.wheelDelta;
		
    if (delta > 0 || e.originalEvent.detail < 0) navigateLeft();
	 	if (delta < 0 || e.originalEvent.detail > 0) navigateRight();
  });
});
            
          
!
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