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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

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HTML

            
              .content
	canvas.snow#snow
	.main-text
		h1 Aw jeez.
			br
			| That page has gone missing.
		a.home-link(href='#') Hitch a ride back home.
	.ground
		.mound 
			.mound_text 404
			.mound_spade
!

CSS

            
              $col-sky-top: #bbcfe1;
$col-sky-bottom: #e8f2f6;
$col-fg: #5d7399;
$col-blood: #dd4040;
$col-ground: #f6f9fa;

@mixin trees($direction, $size) {
	$shadow: ();
	
	@for $i from 1 through 16 {
		$space: $size * 1.2;
		$rand:  (random(20)/10 - 1) * 50px;
		$shadow: append($shadow, ($direction * $i * $space + $rand) (($direction * -$i * $space) + $rand) 15px lighten($col-fg, random(20) + 10%), comma);
	}
		
	box-shadow: $shadow;
}

html,
body {
	height: 100%;
	min-height: 450px;
	
	font-family: 'Dosis', sans-serif;
	font-size: 32px;
	font-weight: 500;
	color: $col-fg;
}

.content {
	height: 100%;
	position: relative;
	
	z-index: 1;
	background-color: mix($col-sky-top, $col-sky-bottom);
	background-image: linear-gradient(to bottom, $col-sky-top 0%, $col-sky-bottom 80%);
	overflow: hidden;
}

.snow {
	position: absolute;
	top: 0;
	left: 0;
	pointer-events: none;
	z-index: 20;
}

.main-text {
	padding: 20vh 20px 0 20px;
	
	text-align: center;
	line-height: 2em;
	font-size: 5vh;
}

.home-link {
	font-size: 0.6em;
	font-weight: 400;
	color: inherit;
	text-decoration: none;
	
	opacity: 0.6;
	border-bottom: 1px dashed transparentize($col-fg, 0.5);
	
	&:hover {
		opacity: 1;
	}
}

.ground {
	height: 160px;
	width: 100%;
	position: absolute;
	bottom: 0;
	left: 0;
	
	background: $col-ground;
	box-shadow: 0 0 10px 10px $col-ground;
	
	$treeSize: 250px;
	&:before,
	&:after {
		
		// Trees
		content: '';
		display: block;
		width: $treeSize;
		height: $treeSize;
		position: absolute;
		top: -$treeSize/4;
		
		z-index: -1;
		background: transparent;
		transform: scaleX(0.2) rotate(45deg);
	}
	
	&:after {
		left: 50%;
		margin-left: -$treeSize / 1.5;
		@include trees(-1, $treeSize);
	}
	
	&:before {
		right: 50%;
		margin-right: -$treeSize / 1.5;
		@include trees(1, $treeSize);
	}
}

.mound {
	margin-top: -80px;
	
	font-weight: 800;
	font-size: 180px;
	text-align: center;
	color: $col-blood;
	pointer-events: none;
	
	$from-top: 50px;
	
	&:before {
		$w: 600px;
		$h: 200px;
		
		content: '';
		display: block;
		width: $w;
		height: $h;
		position: absolute;
		left: 50%;
		margin-left: -$w/2;
		top: $from-top;
		z-index: 1;
		
		border-radius: 100%;
		background-color: $col-sky-bottom;
		background-image: linear-gradient(to bottom, lighten($col-sky-top, 10%), $col-ground 60px);
	}
	
	&:after {
		// Blood
		$w: 28px;
		$h: 6px;
		content: '';
		display: block;
		width: $w;
		height: $h;
		position: absolute;
		left: 50%;
		margin-left: - 150px;
		top: $from-top + 18px;
		
		z-index: 2;
		background: $col-blood;
		border-radius: 100%;
		transform: rotate(-15deg);
		box-shadow: -($w * 2) ($h * 2) 0 1px $col-blood, -($w * 4.5) ($h) 0 2px $col-blood, -($w * 7) ($h * 4) 0 3px $col-blood,
	}
}

.mound_text {
	transform: rotate(6deg);
}

.mound_spade {
	$handle-height: 30px;
	
	display: block;
	width: 35px;
	height: 30px;
	position: absolute;
	right: 50%;
	top: 42%;
	margin-right: -250px;
	
	z-index: 0;
	transform: rotate(35deg);
	background: $col-blood;
	
	&:before,
	&:after {
		content: '';
		display: block;
		position: absolute;
	}
	
	&:before {
		width: 40%;
		height: $handle-height;
		bottom: 98%;
		left: 50%;
		margin-left: -20%;
		
		background: $col-blood;
	}
	
	&:after {
		width: 100%;
		height: 30px;
		top: -$handle-height - 25px;
		left: 0%;
		box-sizing: border-box;
		
		border: 10px solid $col-blood;
		border-radius: 4px 4px 20px 20px;
	}
}
!

JS

            
              (function() {
	function ready(fn) {
		if (document.readyState != 'loading'){
			fn();
		} else {
			document.addEventListener('DOMContentLoaded', fn);
		}
	}
	
	function makeSnow(el) {
		var ctx = el.getContext('2d');
		var width = 0;
		var height = 0;
		var particles = [];
		
		var Particle = function() {
			this.x = this.y = this.dx = this.dy = 0;
			this.reset();
		}
		
		Particle.prototype.reset = function() {
			this.y = Math.random() * height;
			this.x = Math.random() * width;
			this.dx = (Math.random() * 1) - 0.5;
			this.dy = (Math.random() * 0.5) + 0.5;
		}
		
		function createParticles(count) {
			if (count != particles.length) {
				particles = [];
				for (var i = 0; i < count; i++) {
					particles.push(new Particle());
				}
			}
		}
				
		function onResize() {
			width = window.innerWidth;
			height = window.innerHeight;
			el.width = width;
			el.height = height;
			
			createParticles((width * height) / 10000);
		}
		
		function updateParticles() {
			ctx.clearRect(0, 0, width, height);
			ctx.fillStyle = '#f6f9fa';
			
			particles.forEach(function(particle) {
				particle.y += particle.dy;
				particle.x += particle.dx;
				
				if (particle.y > height) {
					particle.y = 0;
				}
				
				if (particle.x > width) {
					particle.reset();
					particle.y = 0;
				}
				
				ctx.beginPath();
				ctx.arc(particle.x, particle.y, 5, 0, Math.PI * 2, false);
				ctx.fill();
			});
			
			window.requestAnimationFrame(updateParticles);
		}
		
		onResize();
		updateParticles();
		
		window.addEventListener('resize', onResize);
	}
	
	ready(function() {
		var canvas = document.getElementById('snow');
		makeSnow(canvas);
	});
})();
!
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