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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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Adding Classes

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About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

!
Insecure Resource

The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.

CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <html>
<head>
 <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
   <link href="https://fonts.googleapis.com/css?family=Lato" rel="stylesheet">
	 <link rel="stylesheet" href="css/futuriste.css">
  <title>404 pages</title>
</head>

<body>


<div id="container">

<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
	 viewBox="0 0 200 82.7" style="enable-background:new 0 0 200 82.7;" xml:space="preserve">

<g id="Calque_1">
	<text id="XMLID_3_" transform="matrix(1.2187 0 0 1 13 75.6393)" class="st0 st1">4</text>
	<text id="XMLID_4_" transform="matrix(1.2187 0 0 1 133.0003 73.6393)" class="st0 st1">4</text>
</g>
<g id="Calque_2">
<g>
	<path id="XMLID_11_" d="M81.8,29.2c4.1-5.7,10.7-9.4,18.3-9.4c6.3,0,12.1,2.7,16.1,6.9c0.6-0.4,1.1-0.7,1.7-1.1
		c-4.4-4.8-10.8-7.9-17.8-7.9c-8.3,0-15.6,4.2-20,10.6C80.7,28.5,81.3,28.8,81.8,29.2z"/>
		<path id="XMLID_2_" d="M118.1,53.7c-4,5.7-10.7,9.5-18.2,9.5c-6.3,0-12.1-2.6-16.2-6.8c-0.6,0.4-1.1,0.7-1.7,1.1
		c4.4,4.8,10.8,7.8,17.9,7.8c8.3,0,15.6-4.3,19.9-10.7C119.2,54.5,118.6,54.1,118.1,53.7z"/>
		 <animateTransform attributeName="transform" type="rotate" from="360 100 41.3" to="0 100 41.3" dur="10s" repeatCount="indefinite" />
  </g>
  <g id="XMLID_6_">
  <g  id="XMLID_18_">	
  	

  		
  		<circle class="circle"  cx="100" cy="41" r="1"></circle>
  	</g>
  </g><defs>
  		<filter id="blurFilter4" x="-20" y="-20" width="200" height="200">
  			<feGaussianBlur in="SourceGraphic" stdDeviation="2" />
  		</filter>
  	</defs>
  <path    id="XMLID_5_" class="st2" d="M103.8,16.7c0.1,0.3,0.1,0.6,0.1,0.9c11.6,1.9,20.4,11.9,20.4,24.1c0,13.5-10.9,24.4-24.4,24.4
  S75.6,55.1,75.6,41.7c0-3.2,0.6-6.3,1.7-9.1c-0.3-0.2-0.5-0.3-0.7-0.5c-1.2,3-1.9,6.2-1.9,9.6c0,14,11.3,25.3,25.3,25.3
  s25.3-11.3,25.3-25.3C125.3,29,115.9,18.5,103.8,16.7z"/>


</g>
</svg>

<div class="message">
     Page not found
</div>
</div>
</body>
	</html>
!

CSS 

              
                *{
	padding:0px;
	margin:0px;
}
body{
		background:black;
	}
.st0{font-family:'FootlightMTLight';}
.st1{font-size:83.0285px;}
.st2{fill:gray;}

svg{
  width: 500px;
    height: 400px;
    text-align: center;
    fill: #16a085;
}
path#XMLID_5_ {
   
    fill: #16a085;
    filter: url(#blurFilter4);
}
path#XMLID_11_ ,path#XMLID_2_ {
    fill: #16a085;
}
.circle{
  animation: out 2s infinite ease-out;
  fill: #16a085;
}

#container{
  text-align:center;
}
.message{
	color:#16a085;
}
.message:after{
	content:"]";
}
.message:before{
	content:"[";
}

.message:after, .message:before {
  
  color: #16a085;
  font-size: 20px;
  -webkit-animation-name: opacity;
  -webkit-animation-duration: 2s;
  -webkit-animation-iteration-count: infinite;
  -webkit-animation-name: opacity;
          animation-name: opacity;
  -webkit-animation-duration: 2s;
          animation-duration: 2s;
  -webkit-animation-iteration-count: infinite;
          animation-iteration-count: infinite;
          margin:0 50px;
}

@-webkit-keyframes opacity {
  0%, 100% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}

@keyframes opacity {
  0%, 100% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}

@keyframes out {
  0% {r:1;  opacity: 0.9 ;}
  25%{r:5;  opacity: 0.3 ;}
  50%{r:10; opacity: 0.2 ;}
  75%{r:15;opacity:0.1;}
 	100% {r:20;opacity:0;}
}
!

JS 

              
                /////   
//// svg 404 page by rebai adnen 
///  flow me on twitter https://twitter.com/adnen_rebai
//
!
999px

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