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HTML 

              
                .layout
	.forest
		- for (var i = 0; i < 3; i++)
			.forest__inner
				.forest--small
					.forest__wrapper
						- for (var x = 0; x < 7; x++)
							.forest__tree
				.forest--big
					.forest__wrapper
						- for (var x = 0; x < 7; x++)
							.forest__tree
			
	.car
		.car__backWall
		.car__windowFrontBlick
		.car__window--frontal
			.window-frontal__angle
		.car__chairs
			.car__chair
				.car__chairHead
			.car__chair
				.car__chairHead
			.car__belt
			
		.granddad
			.granddad__body
			.granddad__hand
			.granddad__neck
			.grandad__header
				.granddad__head
					.grandad__bread
						.grandad__mouth
					.granddad__eyes
					.granddad__nose
					.granddad__ear.granddad__ear--left
					.granddad__ear.granddad__ear--right
					.granddad__hat
		
		.car__steeringWheel
		.car__window--glass
			.car__reflection-cars
				each color in ['red', 'yellow', 'purple', 'green']
					div(class='car__reflection-car car__reflection-car--'+color)
					
		.car__window
			.window__angle.window__angle--top-right
			.window__angle.window__angle--bottom-right
			.window__angle.window__angle--bottom-left
		.car__mirror
			.car__turnSignal
!

CSS 

              
                @mixin size($x, $y: $x) {
	width: $x;
	height: $y;
}

@mixin stretch {
	position: absolute;
	bottom: 0;
	right: 0;
	top: 0;
	left: 0;
}

@mixin helper-position {
	display: flex;
	justify-content: flex-end;
	position: absolute;
	left: 110px;
	right: 0;
	bottom: 0;
	max-width: var(--limited-width);
}

@mixin helper-flex-end {
	display: flex;
	align-items: flex-end;
}

@mixin helper-pseudo-content-block {
	display: block;
	content: '';
}

:root {
	--forest: rgba(150, 183, 190, 1);
	--sky: rgba(170, 216, 241,1);
	--glass: rgba(184, 218, 241, .4);
	--car: rgba(255, 247, 232, 1);
	--car-window: rgba(246, 236, 215, 1);
	--car-shadow: rgba(230, 221, 203, 1);
	--car-wall: rgba(220, 207, 179, 1);
	--armchairs: rgba(186, 112, 87, 1);
	--armchairs-dark: rgba(174, 101, 77, 1);
	--black: rgba(71, 71, 76, 1);
	--skin-face: rgba(255, 172, 126, 1);
	--skin: rgba(255, 150, 113, 1);
	--hat: rgba(166, 150, 142, 1);
	--mouth: rgba(195, 93, 100, 1);
	--turn-signal-orange: rgba(255, 134, 65, 1);
	--turn-signal-yellow: rgba(255, 199, 65, 1);
	--tongue: rgba(254, 105, 89, 1);
	--white: rgba(255, 255, 255, 1);
	--cloth: rgba(178, 163, 158, 1);
	
	--width-window: 74px;
	--limited-width: 800px;
	
	--animation-name-common-move: moveHeadPieces;
	--duration-move-head: 2.5s;
	--function-easing: cubic-bezier(0.68, -0.55, 0.265, 1.55);
} 

body {
	background-color: #232323;
	color: var(--white);
	.layout {
		position: relative;
		@include size(100vw, 100vh);
		min-width: var(--limited-width);
		min-height: 600px;
		margin: 0 auto;
		overflow: hidden;
		background-color: var(--sky);
	}
}

.forest {
	position: absolute;
	bottom: 0;
	@include helper-flex-end;
	.forest__inner {
		animation: moveForest 5s linear infinite forwards;
		&, .forest__wrapper {
			@include helper-flex-end;
		}
		> div {
			&:after {
				@include helper-pseudo-content-block;
				width: calc(100% + 6px);
				margin-left: -13px;
				background-color: var(--forest);
			}
			&.forest--small {
				&:after {height: 40vh;}
			}
			&.forest--big {
				&:after {height: 33vh;}
			}
		}
	}
	
	.forest__tree {
		background-color: var(--forest);
		border-radius: 60px 60px 0 0;
		width: 130px;
		margin-left: -20px;
		margin-bottom: -15px;
		@for $i from 1 through 4 {
			&:nth-child(#{$i}) {
				height: (8*$i)+vh;
				transform: rotate(-10deg);
			}
		}
		&:nth-child(4) {
			transform: rotate(0);
		}
		@for $i from 5 through 7 {
			&:nth-child(#{$i}) {
				height: ((8 - $i) * 8)+vh;
				transform: rotate(10deg);
			}
		}
	}
}

.car {
	position: absolute;
	left: -10px;
	@include size(110vw, 102vh);
	min-width: var(--limited-width);
	min-height: 600px;
	animation: jumpCar .1s ease infinite alternate,
		moveCar 1.5s cubic-bezier(0.455, 0.03, 0.515, 0.955) infinite alternate;
	z-index: 2;
	.car__backWall {
		position: absolute;
		top: -60px;
		left: 400px;
		@include size(100%, 100%);
		border: 150px solid var(--car-wall);		
		border-right-color: transparent;
		border-bottom-color: transparent;
		border-radius: 200px 200px 0 0;
	}
	.car__windowFrontBlick {
		position: absolute;
		top: 300px;
		left: -235px;
		@include size(100px, 140px);
		transform: skew(40deg);
		background-color: rgba(#fff, .6);
		animation: moveFrontBlick 4s cubic-bezier(0.77, 0, 0.175, 1) infinite;
		z-index: -2;
	}
	.car__window {
		@include stretch;
		max-width: var(--limited-width);
		border: var(--width-window) solid var(--car-window);
		border-radius: 600px 150px 150px 150px;
		box-shadow: inset 0 0 0 20px var(--car-shadow);
		z-index: 3;
		.window__angle {
			background-color: var(--car-window);
			position: absolute;
			@include size(130px);
			@media (max-width: 567px) {
				width: 150px;
			}
			&--top-right {
				top: calc(var(--width-window) * -1);
				right: calc(var(--width-window) * -1);
				border-radius: 0 0 0 150px;
			}
			&--bottom-right {
				bottom: calc(var(--width-window) * -1);
				right: calc(var(--width-window) * -1);
				border-radius: 150px 0 0 0;
			}
			&--bottom-left {
				bottom: calc(var(--width-window) * -1);
				left: calc(var(--width-window) * -1);
				border-radius: 0 150px 0 0;
			}
		}
		@media (min-width: 920px) {
			&:after {
				@include helper-pseudo-content-block;
				position: fixed;
				top: 0;
				right: 0;
				left: 920px;
				height: 100%;
				background-color: var(--car-window);
			}
		}

		&--frontal {
			position: relative;
			@include size(50%, 100%);
			border: calc(var(--width-window) * 1.5 + 24px) solid var(--car);
			box-shadow: inset 0 0 0 20px var(--car-shadow);
			border-radius: 0 225px 0 0;
			transform: skew(-30deg) translate(-100%, -60px);
			.window-frontal__angle {
				position: absolute;
				top: calc(var(--width-window) * -1.5);
				left: 0;
				right: calc(var(--width-window) * -6);
				background-color: var(--car);
				height: calc(var(--width-window) * 1.5);		
			}
			&:after {
				@include helper-pseudo-content-block;
				position: absolute;
				right: -200px;
				top: -80px;
				background-color: var(--car);
				@include size(150px, 200px);
				border-radius: 0 0 150px 0;
			}
		}
		
		&--glass {
			position: absolute;
			right: calc(var(--width-window) - 40px);
			bottom: var(--width-window);
			overflow: hidden;
			left: 220px;
			height: 170px;
			background-color: var(--glass);
			border-radius: 300px 60px 0 0;
			transform: skew(-40deg);
			z-index: 3;
			&:before {
				@include helper-pseudo-content-block;
				position: absolute;
				@include size(80px, inherit);
				transform: skew(60deg);
				background-color: rgba(#fff, .5);
				animation: moveBlick 4s cubic-bezier(0.77, 0, 0.175, 1) infinite;
			}
		}
	}
	.car__reflection-cars {
		display: flex;
		position: absolute;
		bottom: -20px;
		left: 0;
		animation: moveCars 2s linear infinite forwards;
		.car__reflection-car {
			margin-left: 550px;
			@include size(700px, 90px);
			border-radius: 90px 90px 0 0;
			transform: skew(40deg);
			&:after, &:before {
				@include helper-pseudo-content-block;
				position: absolute;
				top: -170px;
				@include size(136px, 80px);
				border: 90px solid transparent;
				border-bottom: none;
				
			}
			&:before {
				left: 80px;
				border-right-width: 44px;
				border-radius: 200px 0 0 0;
			}
			&:after {
				right: 80px;
				border-left-width: 45px;
				border-radius: 0 200px 0 0;
			}
			@each $color in red, yellow, purple, green {
				&--#{$color} {
					background-color: rgba($color, .3);
					&:after, &:before {
						border-color: rgba($color, .3)
					}
				}
			}
		}
	}
	.car__chairs {
		@include helper-position;
		.car__chair {
			margin: 0 10px;
			@include size(220px, 340px);
			background-color: var(--armchairs);
			border-radius: 50px 50px 0 0;
			&:before {
				@include helper-pseudo-content-block;
				@include size(100px, inherit);
				margin-left: 120px;
				background-color: var(--armchairs-dark);
				border-radius: inherit;
			}
		}
		.car__chairHead {
			position: absolute;
			bottom: 340px;
			@include size(220px, 150px);
			background-color: var(--armchairs);
			border-radius: 50px;
			&:before {
				@include helper-pseudo-content-block;
				@include size(100px, inherit);
				margin-left: 120px;
				background-color: var(--armchairs-dark);
				border-radius: inherit;
			}
		}
		.car__belt {
			position: absolute;
			right: 180px;
			bottom: 0;
			@include size(70px, 500px);
			background-color: var(--black);
			transform: skew(-40deg);
			z-index: 3;
		}
	}
	
	.car__steeringWheel {
		position: absolute;
		left: 30px;
		bottom: -40px;
		@include size(200px, 200px);
		border: 30px solid var(--black);
		border-radius: 50%;
	}
	.car__mirror {
		position: absolute;
		bottom: 20px;
		left: 10px;
		z-index: 3;
		&:after, &:before {
			@include helper-pseudo-content-block;
			position: absolute;
			left: 0;
			background-color: var(--car);			
		}
		&:before {
			bottom: 40px;
			@include size(90px, 140px);
			border-radius: 0 0 50px 50px;
			box-shadow: 0px 2px 0 1px rgba(#000, .03);
		}
		&:after {
			bottom: 120px;
			@include size(200px, 130px);
			border-radius: 50px;
		}
		.car__turnSignal {
			position: absolute;
			bottom: 165px;
			left: 130px;
			@include size(70px, 40px);
			border-radius: 30px 0 0 30px;
			background-color: var(--turn-signal-orange);
			animation: blinkTurnSignal 1s steps(1) infinite;
			z-index: 1;
			&:before {
				content: '';
				display: block;
				position: absolute;
				top: 10px;
				left: 10px;
				@include size(60px, 20px);
				border-radius: inherit;
				background-color: var(--turn-signal-yellow);
			}
		}
	}
}

.granddad {
	@include helper-position;
	.granddad__body {
		margin-right: 110px;
		@include size(320px, 330px);
		border-radius: 150px 150px 0 0;
		background-color: var(--cloth);
	}
	.granddad__hand {
		position: absolute;
		top: 140px;
		left: 110px;
		@include size(90px);
		background-color: var(--skin-face);
		border-radius: 50%;
		animation: moveHand 1s cubic-bezier(0.55, 0.085, 0.68, 0.53) infinite alternate;
		z-index: 3;
	}
	.granddad__neck {
		position: absolute;
		right: 310px;
		top: -50px;
		@include size(60px, 120px);
		border-radius: 30px;
		transform: rotate(-40deg);
		background-color: var(--skin);
		animation: jumpNeck .7s ease infinite alternate;
	}
	.grandad__header {
		position: relative;
		animation: jumpHead .7s ease infinite alternate,
			moveHead var(--duration-move-head) var(--function-easing) infinite;
		.granddad__head {
			position: absolute;
			right: 310px;
			top: -190px;
			@include size(180px, 240px);
			&:before {
				@include helper-pseudo-content-block;
				position: absolute;
				@include size(100%);
				background-color: var(--skin-face);
				border-radius: 80px;
				z-index: 2;
			}
		}
		.grandad__bread {
			position: absolute;
			bottom: -60px;
			left: -10px;
			@include size(200px, 160px);
			border-radius: 80px;
			background-color: var(--white);
			animation: var(--animation-name-common-move) var(--duration-move-head) var(--function-easing) infinite;
			z-index: 3;
			&:before {
				@include helper-pseudo-content-block;
				position: absolute;
				top: -10px;
				left: 55px;
				@include size(80px, 30px);
				border-radius: 20px;
				background-color: var(--white);
			}
			&:after {
				@include helper-pseudo-content-block;
				position: absolute;
				top: 38px;
				left: 60px;
				@include size(40px, 0px);
				border-radius: 50%;
				border: 15px solid var(--white);
			}
			.grandad__mouth {
				position: absolute;
				top: 20px;
				left: 70px;
				@include size(20px, 0px);
				border-radius: 50%;
				border: 15px solid var(--mouth);
				animation: scaleMouth 1.5s ease infinite alternate;
				&:after {
					@include helper-pseudo-content-block;
					position: absolute;
					top: -5px;
					@include size(20px);
					border-radius: 50%;
					background-color: var(--tongue);
					animation: moveTongue var(--duration-move-head) var(--function-easing) infinite;
				}
			}
		}
		.granddad__eyes {
			display: flex;
			justify-content: space-between;
			width: 80px;
			position: absolute;
			top: 100px;
			left: 47px;
			animation: var(--animation-name-common-move) var(--duration-move-head) var(--function-easing) infinite;
			z-index: 3;
			&:before, &:after {
				@include helper-pseudo-content-block;
				position: relative;
				@include size(15px);
				background-color: var(--black);
				border-radius: 50%;
				animation: blinkingEyes var(--duration-move-head) var(--function-easing) infinite;
			}
		}
		.granddad__nose, .granddad__ear {
			position: absolute;
			top: 100px;
			@include size(25px, 50px);
			border-radius: 20px;
			background-color: var(--skin);
			transform-origin: center 0;
		}
		.granddad__nose {
			left: 75px;
			animation: var(--animation-name-common-move) var(--duration-move-head) var(--function-easing) infinite;
			z-index: 3;
		}
		.granddad__ear {
			&--left {
				left: -15px;
				animation: visibleLeftEar var(--duration-move-head) var(--function-easing) infinite;
			}
			&--right {
				right: -15px;
				z-index: 3;
				animation: visibleRightEar var(--duration-move-head) var(--function-easing) infinite;
			}
		}
		.granddad__hat {
			position: absolute;
			top: -20px;
			left: -10px;
			animation: var(--animation-name-common-move) var(--duration-move-head) var(--function-easing) infinite;
			z-index: 3;
			&:before {
				@include helper-pseudo-content-block;
				position: absolute;
				bottom: -13px;
				left: 30px;
				@include size(110px, 17px);
				background-color: var(--hat);
				border-radius: 0 0 20px 20px;
				animation: moveVisor var(--duration-move-head) var(--function-easing) infinite;
			}
			&:after {
				position: relative;
				@include helper-pseudo-content-block;
				@include size(200px, 64px);
				background-color: #a6968e;
				background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='36' height='36' viewBox='0 0 100 100'%3E%3Crect x='0' y='0' width='79' height='79' fill='%23b2a39d'/%3E%3C/svg%3E");
				background-attachment: fixed;
				border-radius: 30px;
			}
		}
	}
}

@keyframes moveForest {
	0% {
		transform: translateX(-100%);
	}
	100% {
		transform: translateX(0%);
		
	}
}
@keyframes moveCars {
	0% {
		transform: translateX(0%);
	}
	100% {
		transform: translateX(-100%);
	}
}
// car
@keyframes blinkTurnSignal {
	0% {
		filter: grayscale(0);
	}
	50% {
		filter: grayscale(1);
	}
	100% {
		filter: grayscale(0);
	}
}
@keyframes jumpCar {
	0% {
		transform: translateY(-1px);
	}
	100% {
		transform: translateY(1px);
	}
}
@keyframes moveCar {
	0% {
		left: -17px;
	}
	100% {
		left: -10px;
	}
}
@keyframes moveBlick {
	0% {
		transform: skew(60deg) translateX(-200px);
	}
	100% {
		transform: skew(60deg) translateX(100vw);
	}
}
@keyframes moveFrontBlick {
	0% {
		transform: skew(50deg) translate(0, 0);
	}
	100% {
		transform: skew(50deg) translate(700px, -300px);
	}
}
// granddad
@keyframes moveHand {
	0% {
		transform: translate(10px, 30px);
	}
	100% {
		transform: translate(0px, 20px);
	}
}
@keyframes blinkingEyes {
  0% {
    top: 0px;
    height: 15px;
  }
  5% {
    top: 0px;
    height: 15px;
  }
	90% {
		top: 0px;
    height: 15px; 
	}
  95% {
    top: 10px;
    height: 5px;
  }
 	100% {
    top: 0px;
    height: 15px;
  }
}
@keyframes jumpHead {
	0% {
		transform: translateY(-3px);
	}
	100% {
		transform: translateY(3px);
	}
}
@keyframes moveHead {
	0% {
		left: -20px;
	}
	25% {
		left: -20px;
	}
	40% {
		left: -20px;
	}
	60% {
		left: 5px;
	}
	75% {
		left: 5px;
	}
	90% {
		left: 5px;
	}
	100% {
		left: -20px;
	}
}
@keyframes jumpNeck {
	0% {
		transform: rotate(-40deg) translate(0, -1px);
	}
	100% {
		transform: rotate(-40deg) translate(-1px, 1px);
	}
}
@keyframes moveHeadPieces {
	0% {
		transform: translateX(-20px);
	}
	25% {
		transform: translateX(-20px);
	}
	40% {
		transform: translateX(-20px);
	}
	60% {
		transform: translateX(15px);
	}
	75% {
		transform: translateX(15px);
	}
	90% {
		transform: translateX(15px);
	}
	100% {
		transform: translateX(-20px);
	}
}
@keyframes moveVisor {
	0% {
		transform: translateX(-5px);
	}
	25% {
		transform: translateX(-5px);
	}
	40% {
		transform: translateX(-5px);
	}
	60% {
		transform: translateX(30px);
	}
	75% {
		transform: translateX(30px);
	}
	90% {
		transform: translateX(30px);
	}
	100% {
		transform: translateX(-5px);
	}
}
@keyframes moveTongue {
	0% {
		transform: translateX(12px);
	}
	25% {
		transform: translateX(12px);
	}
	40% {
		transform: translateX(12px);
	}
	60% {
		transform: translateX(-8px);
	}
	75% {
		transform: translateX(-8px);
	}
	90% {
		transform: translateX(-8px);
	}
	100% {
		transform: translateX(12px);
	}
}
@keyframes scaleMouth {
	0% {
		transform: scale(.95);
	}
	100% {
		transform: scale(1);
	}
}
@keyframes visibleLeftEar {
	0% {
		z-index: 1;
	}
	25% {
		z-index: 1;
	}
	40% {
		z-index: 1;
	}
	60% {
		z-index: 3;
	}
	75% {
		z-index: 3;
	}
	90% {
		z-index: 3;
	}
	100% {
		z-index: 1;
	}
}
@keyframes visibleRightEar {
	0% {
		z-index: 3;
	}
	25% {
		z-index: 3;
	}
	40% {
		z-index: 3;
	}
	60% {
		z-index: 1;
	}
	75% {
		z-index: 1;
	}
	90% {
		z-index: 1;
	}
	100% {
		z-index: 3;
	}
}
!

JS 

              
                'use strict';

// shot from https://dribbble.com/shots/6274820-Fast-Lane
!
999px

Console