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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

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

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.

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CSS

About CSS Preprocessors

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

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

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JavaScript

About JavaScript Preprocessors

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

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Babel includes JSX processing.

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You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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HTML 

              
                <div class="row cloud-processing">
  <div class="lines">
    <div class="line-pre">
      <div class="line pre"></div>
    </div>
    <div class="line-post">
      <div class="line post"></div>
    </div>
  </div>
  <div class="pre-docs">
    <div class="document doc">
      <span></span>
      <em>DOC</em>
    </div>
    <div class="document pdf">
      <span></span>
      <em>PDF</em>
    </div>
    <div class="clear"></div>
  </div>
  <div class="post-doc">
    <div class="document html">
      <span></span>
      <em>HTML 5</em>
    </div>
  </div>
  <div class="copy">
    <div class="pre-text">
      <h4>You ...</h4>
      <p class="darkgrey">Post your document to the Signature.io's API for processing. You can  jpgs, docs, pdfs, html and more.<a href="http://signature.io" target="_blank"> checkout the list</a>
      </p>
    </div>
    <div class="post-text">
      <h4>Signature.io ...</h4>
      <p class="darkgrey">Creates a special HTML 5 document, and a link to the signable document<a href="http://jcbl.ws" target="_blank" class="button">Try it out</a>
      </p>
    </div>
  </div>
  <div class="cloud"></div>
  <div class="clear"></div>
</div>
!

CSS 

              
                @import "compass/css3";

@import "compass/css3";

@mixin keyframes( $animationName ){
  
    @-webkit-keyframes $animationName {
        @content;
    }
    @-moz-keyframes $animationName {
        @content;
    }
    @-o-keyframes $animationName {
        @content;
    }
    @keyframes $animationName {
        @content;
    }
}

@mixin animation ($animation, $duration, $count, $delay) {
    -webkit-animation-delay: $delay;
    -webkit-animation-duration: $duration;
    -webkit-animation-name: $animation;
    -webkit-animation-iteration-count: $count;
    -webkit-animation-timing-function: linear;
    -webkit-animation-fill-mode: forwards;
 
    -moz-animation-delay: $delay;
    -moz-animation-duration: $duration;
    -moz-animation-name: $animation;
    -moz-animation-iteration-count: $count;
    -moz-animation-timing-function: linear;
    -moz-animation-fill-mode: forwards;
 
    -o-animation-delay: $delay;
    -o-animation-duration: $duration;
    -o-animation-name: $animation;
    -o-animation-iteration-count: $count;
    -o-animation-timing-function: linear;
    -o-animation-fill-mode: forwards;
  
    animation-delay: $delay;
    animation-duration: $duration;
    animation-name: $animation;
    animation-iteration-count: $count;
    animation-timing-function: linear;
    animation-fill-mode: forwards;
}

@keyframes jitter {
  0% {
    @include translate(0, 0);
  }
  25% {
    @include translate(3px, 0);
  }
  50% {
    @include translate(-3px, 0);
  }
  75% {
    @include translate(3px, 0);
  }
  100% {
    @include translate(0, 0);
  }
}

@keyframes flyin {
  0% {
    @include transform(
      translate(0, 0)
      rotate(0deg)
      scale(1)    
    )
  }
  25% {
    @include transform(
      translate(30px, -40px)
      rotate(20deg)
      scale(.9)
    ) 
  }
  50% {
    @include transform(
      translate(70px, -30px)
      rotate(45deg)
      scale(.8)
    ) 
  }
  100% {
    @include transform(
      translate(360px, 20px)
      rotate(90deg)
      scale(.6)
    ) 
  }
}

@keyframes flyout {
  0% {
    @include transform(
      rotate(-90deg) 
      scale(.3)
    );
    margin-right: 350px;
  }
  100% {
    @include transform(
      rotate(0deg) 
      scale(1)
    ); 
    margin-right: 30px; 
  }
}

@keyframes ticker {
  0%{
    padding-left: 50px;
    width: 200px;
  }
  100%{
    width: 50px;
    padding-left: 200px;
  }
}

@keyframes fadeinout{
  0%{
    @include opacity(0);
  }
  25%{
    @include opacity(1);
  }
  75%{
    @include opacity(1);
  }
  100%{
    @include opacity(0);
    display: none;
  }
}

@keyframes fadein {
  0%{
    @include opacity(0);
  }
  100%{
    @include opacity(1);
  }
}

body{
  background: #ECEEF1;
}

a{
  color: #D73825;
  font-size: .8em;
  text-decoration: none;
}

h4{
  color: #222;
  font-size: 23px;
  margin: 0;
  padding: 0;
}

.darkgrey{
  color: #9099A3;
  font-size: 23px;
}

.row{
  margin : 30px auto;
  padding: 10px 0;
  max-width: 940px;
  position: relative;
}

@mixin triangle{
  @include transition-property(border-width);
  @include transition-duration(1s);
  @include transition-timing-function(ease-out);
  content: "";
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 0;
  border-width: 20px;
  border-color: 
    #ddd 
    rgba(255,255,255,.3)       
    rgba(255,255,255,.3) 
    #ddd;
  @include box-shadow(
      2px 2px 3px rgba(0,0,0,.3)
  );
  border-style: solid;
}

.pre-docs{
  position: absolute;
  margin-top: 50px;
  float: left;
  .document{
    float: left;
  }
}

.post-doc{
  float: right;
  @include transform(
      rotate(-90deg) 
      scale(.3)
  );
  margin-right: 350px;
}

.document{
  width : 100px;
  height : 125px;
  margin: 15px;
  position: relative;
  z-index: 1;
  text-align: center;
  span{
     @include triangle;
  }
  em{
      position: absolute;
      bottom: 5px;
      right: 7px;
      font-style : none;
      color: rgba(255,255,255,.5);
  }
  &:hover{
    span{
      border-width: 30px;
    }
  }
  &.doc{
    background : #38405b;
    span{
      border-color: 
        #ECEEF1 
        #73798b       
        #73798b 
        #ECEEF1;
    }
  }
  &.pdf{
    background : #dd4b39;
    span{
      border-color:
        #ECEEF1 
        #e78074       
        #e78074
        #ECEEF1;
    }
  }
  &.html{
    background : #38405b;
    width : 150px;
    height : 180px;
    span{
      border-color: 
        #ECEEF1 
        #dd4b39    
        #dd4b39 
        #ECEEF1;
    }
    em{
     color: #fff;
     font-size: 1.2em;
    }
  }
}

.cloud{
  height: 125px;
  background: #fff;
  width: 300px;
  margin: 100px auto 0;
  border-radius: 75px;
  position: relative;
  z-index: 3;
  @include box-shadow(0 1px 1px rgba(0,0,0,.3));
  &:after{
    display: inline-block;
    content : "";
    width: 80px;
    height: 80px;
    border-radius: 100%;
    position: absolute;
    top: -65px;
    left: 180px; 
    background: #fff;
  }
  &:before{
    display: inline-block;
    content : "";
    width: 150px;
    height: 150px;
    border-radius: 100%;
    position: absolute;
    top: -90px;
    left: 50px;
    background: #fff;
    
  }
}

.copy{
  position: relative;
  > div{
    position: absolute;
    top: 20px;
    left: 30px;
    max-width: 275px;
    @include opacity(0);
  }
}
.lines{
  > div{
    @include opacity(0);
  }
  .line{
    @include animation(ticker, 1s, infinite, 0);
    width: 200px;
    height: 30px;
    overflow: hidden;
    position: absolute;
    top: 50%;
    &:after{
      border-top: 20px dotted #9099A3;
      margin-left: -200px;
      width: 600px;
      height: 100px;
      content: "";
      display: inline-block;
    }
    &.post{
      right: 100px;    
    }
    &.pre{
      left: 100px;
    }
  }
}
.button{
  @include transition(all .3s);
  width: auto;
  background: #DD4A38;
  @include border-radius(3px);
  border: none;
  border-bottom: 5px solid #9C3528;
  color: white;
  cursor: pointer;
  display: inline-block;
  font-family: inherit;
  font-size: 14px;
  font-weight: bold;
  line-height: 1;
  margin: 10px 0;
  padding: 10px 20px 11px;
  position: relative;
  text-align: center;
  text-decoration: none;
  &:active{
    @include transform(translate(0, 5px));
    border-bottom-width: 0;
  }
}

.cloud-processing.process{
  
  .line-pre{
      @include animation(fadeinout, 1s, 1, 0);
  }
  .line-post{
      @include animation(fadein, 1s, 1, 5s);
  }
 
  .pre-docs{
    .doc{
      @include animation(flyin, .8s, 1, .5s);
    }
    .pdf{
      @include animation(flyin, 1s, 1, 0);
    }
  }
  .post-doc{
    @include animation(flyout, 1s, 1, 4s); 
  }
  .cloud{
    @include animation(jitter, 1s, 4, 1s );
  }
  .pre-text{
    @include animation(fadeinout, 4s, 1, 1s);
  }
  .post-text{
    @include animation(fadein, 1s, linear, 5s);
  }
}

.clear{
  clear: both;
}
!

JS 

              
                // for http://signature.io
var cloud = $('.cloud');
var process = $(".cloud-processing");

process.addClass("process");


// to restart the animation click and hold on the cloud
cloud.on("mousedown", function(){
  process.addClass("process");
});

cloud.on("mouseup", function(){
  process.removeClass("process");
});

// TODO
//- settup mobile friendly version
!
999px

Console