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HTML

About HTML Preprocessors

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.

!
Insecure Resource

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

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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HTML 

              
                <!-- Cookie Font --> 
<link href='http://fonts.googleapis.com/css?family=Cookie' rel='stylesheet' type='text/css'>

<div class="circle" id="bg">
  <div class="text"> Happy Birthday AMP! </div> 
  
<!-- <button type="button" onclick='getElementById("bg").style.backgroundColor = "#f69e54"'>Click to Change Colors </button>
-->
  
  <!-- Words on Birthday Hat, Roman Numerals for 23-->
    <div class="X1a"></div>
   <div class="X1b"></div>
    <div class="X2a"></div>
  <div class="X2b"></div>
    <div class="I1"></div>
    <div class="I2"></div>
  <!-- <div class="I3"></div> -->
 
  <!-- Decor on the point of the Birthday Hat -->
  <div class="dot"></div> 
  
 <div class="face">
   <div class="nose"></div>
  <div class="forehead-shine"></div>
  <div class="l-eye">
    <div class="l-lid"></div>
  </div>
  <div class="r-eye">
    <div class="r-lid"></div>
  </div>
   <div class="l-brow"></div>
   <div class="r-brow"></div> 
  <div class="nose"></div>
  <div class="mouth"></div> 
   <div class="l-cheek"></div> 
   <div class="r-cheek"></div> 
 </div> 

 <!-- Outside the Face -->
  <div class="hat">
    <!-- styling for top and margin-top doesn't work, why? 
    <div class="X1"></div>
    <div class="X2"></div>
    <div class="I1"></div>
    <div class="I2"></div> -->  
  </div>
<div class="neck">
  <div class="neck-shadow"></div>
</div>
  
<div class="hair"></div> 
  
  <div class="body">
    <div class="l-cover"></div>
  </div>
   
  <div class="r-body">
     <div class="r-cover"></div>
  </div>
  
  <div class="l-hand"></div>
  <div class="r-hand"></div>
   
</div>
!

CSS 

              
                body {
  background-color: #62babd; 
}

/* Find out how to move button that has position: relative */ 
button {
  width: 150px; 
  height: 60px; 
  position: absolute; 
  right: -60%; 
  top: 20%; 
  color: white; 
  font-family: Courier; 
  background-color: #ea8c82; 
  border: 4px solid #fb556e;  
}
.circle {
  position: relative; 
  margin: auto; 
  width: 400px; 
  height: 400px; 
  border-radius: 50%; 
  background: linear-gradient(#f5be3b, #efc622); /* note - you can add three colors */
  border: 10px solid white;
 /* border-box: border; 
  box-shadow: inset 5px 5px 0px 25px #d6bf80; */  
  margin-top: 3%; 
  
}
/* Search for ways to curve the text with JS only, CSS only, ... */ 
.text {
  position: absolute; 
  top: 20%; 
  right: -90%; 
  font: 300 50px/0.8 'Cookie', Helvetica, sans-serif; /* REVIEW */ 
  color: white;
  text-shadow: 4px 4px 3px rgba(0,0,0,0.1); /* REVEIW */ 

}

.face {
  position: absolute; 
  width: 120px;
  height: 150px; 
  background-color: #dec3ae; 
  border-radius: 60px; 
  left: 35%; 
  top: 25%; 
  z-index: 4; 
  
}

.nose {
  position: absolute; 
  background-color: #c5a78d;
  border-bottom-left-radius: 40px; 
  border-bottom-right-radius: 40px; 
  width: 15px; 
  height: 5px; 
  top: 62%; 
  left: 45%; 
  
}

.forehead-shine {
  position: absolute; 
  background-color: #f1f2ed; 
  width: 8%; 
  height: 10%;
  border-radius: 30px; 
  transform: rotate(110deg);
  -webkit-transform:rotate(110deg); 
  -ms-transform: rotate(110deg); 
  -os-transform: rotate(110deg);
  right: 24%; 
  top: 12%; 
  
}

.l-eye {
  position: absolute; 
  background-color: #231d37; 
  width: 10%; 
  height: 6%; 
  border-radius: 50%;  
  transform: rotate(10deg);
   -webkit-transform:rotate(10deg); 
  -ms-transform: rotate(10deg); 
  -os-transform: rotate(10deg);
  top: 45%;
  left: 25%; 
}

.r-eye {
  position: absolute; 
  background-color: #231d37; 
  width: 10%; 
  height: 6%; 
 border-radius: 50%; 
  transform: rotate(-10deg);
   -webkit-transform:rotate(-10deg); 
  -ms-transform: rotate(-10deg); 
  -os-transform: rotate(-10deg);
  top: 45%;
  right: 25%; 
}

.l-lid {
  position: absolute; 
  background-color: #211a39; 
  width: 30%; 
  height: 250%; 
  transform: rotate(85deg);
   -webkit-transform:rotate(85deg); 
  -ms-transform: rotate(85deg); 
  -os-transform: rotate(85deg);
  top: -130%; 
  left: -20%; 
}

.r-lid {
  position: absolute; 
  background-color: #211a39; 
  width: 30%; 
  height: 250%; 
  transform: rotate(95deg);
   -webkit-transform:rotate(95deg); 
  -ms-transform: rotate(95deg); 
  -os-transform: rotate(95deg);
  top: -130%; 
  left: 80%; 
}

.mouth {
  position: absolute; 
  width: 30%; 
  height: 10%; 
  border-bottom-right-radius: 20px; 
  border-bottom-left-radius: 20px; 
  border: 2px solid #e299a4; 
  background-color: white; 
  top: 70%;
  left: 35%; 
}

.l-brow {
  position: absolute; 
  background-color: #dec3ae; 
  border-radius: 50%; 
  width: 25%; 
  height:5%; /* adjust hight to control curve */ 
  box-shadow:0.5px 2px 0px 0px #211a39; /*first controls vertical mvt, second controls horizontal mvt, others are blur and radius */
  top: 32%; 
  left: 10%; 
  transform: rotate(185deg); /* flipped the shape to get an eyebrow */ 
   -webkit-transform:rotate(185deg); 
  -ms-transform: rotate(185deg); 
  -os-transform: rotate(185deg);
}

.r-brow {
  position: absolute; 
  background-color: #dec3ae; 
  border-radius: 50%; 
  width: 25%; 
  height:5%; /* adjust hight to control curve */ 
  box-shadow:0.5px 2px 0px 0px #211a39; /*first controls vertical mvt, second controls horizontal mvt, others are blur and radius */
  top: 32%; 
  right: 10%; 
  transform: rotate(175deg); /* flipped the shape to get an eyebrow */ 
    -webkit-transform:rotate(175deg); 
  -ms-transform: rotate(175deg); 
  -os-transform: rotate(175deg);
  
}

.hair {
  position: absolute; 
  background-color: black; 
  border-top-right-radius: 60px;
  border-top-left-radius: 60px;
  border-bottom-right-radius: 40px;
  border-bottom-left-radius: 40px; 
  width: 150px; 
  height: 190px; 
  left: 31%;
  top: 21%; 
  z-index: 1; 
}

.neck {
  position: absolute; 
  background-color: #d0b5a1;
  border-radius: 40px; 
  width: 6%; 
  height: 10%; 
  top: 60%; 
  left: 47.3%;
  z-index: 3; 
}

.neck-shadow {
  position: absolute; 
  background-color: #b6967d;
  border-radius: 50px; 
  width: 100%; 
  height: 50%; 
  top: -1%; 
  z-index: 8; 
}

.body {
  position: absolute; 
  background-color: #1fa186;
  border-top-right-radius: 50px; 
  border-top-left-radius: 50px; 
  top: 65%;
  left: 35%; 
  width: 120px; 
  height: 130px; 
  z-index: 1; 
}

/* Find a way to color only half a div */ 
.r-body {
  position: absolute; 
  background-color: #1c947b;
  border-top-right-radius: 50px; 
  border-top-left-radius: 20px; 
  top: 65%;
  right: 35%; 
  width: 60px; 
  height: 128px; 
  z-index: 2; 
}

.l-cover {
  position: absolute; 
  background-color:#1fa186 ;
  border-bottom-left-radius: 20px; 
  border-bottom-right-radius: 10px; 
  transform: rotate(8deg); 
   -webkit-transform:rotate(8deg); 
  -ms-transform: rotate(8deg); 
  -os-transform: rotate(8deg);
  width: 60px; 
  height: 15px; 
  top: 97%;
  left: -1.26%; 
  z-index: 1; 
  
}


.r-cover {
  position: absolute; 
  background-color: #1c947b;
  border-bottom-left-radius: 20px; 
  border-bottom-right-radius: 10px; 
  transform: rotate(-8deg); 
    -webkit-transform:rotate(-8deg); 
  -ms-transform: rotate(-8deg); 
  -os-transform: rotate(-8deg);
  width: 60px; 
  height: 15px; 
  top: 97%;
  left: -1.26%; 
  z-index: 1;
  
}

.l-hand {
  position: absolute; 
  background: #dec3ae; 
  border-radius: 50%; 
  width: 30px; 
  height: 30px; 
  top: 95%; 
  left:44%; 
  z-index: 3; 
}

.r-hand {
  position: absolute; 
  background: #d5b296; 
  border-radius: 50%; 
  width: 30px; 
  height: 30px; 
  top: 95%; 
  right:44%; 
  z-index: 2; 
}

.l-cheek {
  position: absolute;
  width:25px;
  height: 25px; 
  background-color: #ea8c82;
  opacity: 0.8;
  border-radius: 50%;
  top: 52%;
  left: 7%;
}


.r-cheek {
  position: absolute;
  width:25px;
  height: 25px; 
  background-color: #ea8c82;
  opacity: 0.8;
  border-radius: 50%;
  top: 52%;
  right: 7%;
}

/* Birthday hat and its decorations */ 
.hat {
  position: absolute; 
  background: none; 
  width: 0; 
  height: 0; 
  border-left: 40px solid transparent; /* For transparent to work, background: none must be set1 */ 
  border-right: 40px solid transparent; 
  border-bottom: 80px solid #ee7987; 
  top: 5%;
  left: 40%; 
}

.X1a {
  position: absolute; 
  background: white; 
  opacity: 1; 
  width: 3px; 
  height: 20px;
  /* top and margin-top doesn't work, when div elements are children of hat div, why */ 
  transform: rotate(30deg);
  -webkit-transform: rotate(30deg); 
  -ms-transform: rotate(30deg);
  -os-transform: rotate(30deg); 
  top: 16%; 
  left: 45%; 
  z-index: 2; 
   
  
}

.X1b {
  position: absolute; 
  background: white; 
   opacity: 0.8; 
  width: 3px; 
  height: 16px;
  /* top and margin-top doesn't work, when div elements are children of hat div, why */ 
  transform: rotate(-30deg);
  -webkit-transform: rotate(-30deg); 
  -ms-transform: rotate(-30deg);
  -os-transform: rotate(-30deg); 
  top: 16.5%; 
  left: 45%; 
  z-index: 2; 
   
  
}

.X2a {
  position: absolute; 
  background: white;
   opacity: 0.7; 
  width: 3px; 
  height: 20px;
  /* top and margin-top doesn't work, when div elements are children of hat div, why */ 
  transform: rotate(30deg);
  -webkit-transform: rotate(30deg); 
  -ms-transform: rotate(30deg);
  -os-transform: rotate(30deg); 
  top: 16%; 
  left: 48%; 
  z-index: 2; 
   
  
}

.X2b {
  position: absolute; 
  background: white; 
   opacity: 0.6; 
  width: 3px; 
  height: 16px;
  /* top and margin-top doesn't work, when div elements are children of hat div, why */ 
  transform: rotate(-30deg);
  -webkit-transform: rotate(-30deg); 
  -ms-transform: rotate(-30deg);
  -os-transform: rotate(-30deg); 
  top: 16.5%; 
  left: 48%; 
  z-index: 2; 
   
  
}

.I1 {
  position: absolute; 
  background: white; 
   opacity: 0.6; 
  width: 3px; 
  height: 16px;
  /* top and margin-top doesn't work, when div elements are children of hat div, why */ 
  top: 16.5%; 
  left: 51%; 
  z-index: 2; 
   
  
}

.I2 {
  position: absolute; 
  background: white; 
   opacity: 0.5; 
  width: 3px; 
  height: 15px;
  /* top and margin-top doesn't work, when div elements are children of hat div, why */ 
  top: 16.75%; 
  left: 53%; 
  z-index: 2; 
   
  
}

.I3 {
  position: absolute; 
  background: white; 
  opacity: 0.4; 
  width: 3px; 
  height: 14px;
  /* top and margin-top doesn't work, when div elements are children of hat div, why */ 
  top: 17%; 
  left: 55%; 
  z-index: 2; 
   
  
}

.dot {
  position: absolute; 
  background: white; 
  width: 20px; 
  height: 20px;
  border-radius: 50%; 
  box-shadow: 0px 0px 20px 5px white;  /* REVIEW *  fourth gives corner blur, last gives glow?*/ 
  left: 47.65%;
  top: 2%; 
  z-index: 3; 
  
}
!

JS 

              
                //getElementById("bg").style.backgroundColor = "#f69e54"; 

// how to cycle through different colors while clicking one button ?
!
999px

Console