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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.

!
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-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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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 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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Packages

Add Packages

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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Using packages here is powered by Skypack, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ES6 import usage.

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HTML 

              
                <div class="container">
  <div class="america">
    <div class="america-blue">
      <div class="star-row">
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
      </div>
      <div class="star-row-5">
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
       
      </div>
      <div class="star-row">
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
      </div>
      <div class="star-row-5">
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
       
      </div>
      <div class="star-row">
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
      </div>
      <div class="star-row-5">
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
       
      </div>
      <div class="star-row">
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
        <svg class="star">
          <use xlink:href="#star"></use>
        </svg>
      </div>
    </div>
    <div class="stripes">
      <div class="stripe"></div>
      <div class="stripe"></div>
      <div class="stripe"></div>
      <div class="stripe"></div>
      <div class="stripe"></div>
      <div class="stripe"></div>
    </div>
  </div>
</div>
<svg xmlns="http://www.w3.org/2000/svg" width="0" height="0"  fill="white" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" >
    <defs>
    <symbol id="star" fill="white" viewBox="0 0 250 250">
       <path d="m55,237 74-228 74,228L9,96h240"/>
     </symbol>
    </defs>
 </svg>
!

CSS 

              
                body {
  padding: 0;
  overflow: hidden;
  background: linear-gradient(90deg, #041E42 20%, #9b1c2c 100%);
}
.container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  width: 100vw;

}
.america {
  width: 900px;
  min-width: 900px;
  height: 450px;
  background: #BF0A30;
  position: relative;
  box-shadow: 0px 20px 80px 10px rgba(0,0,0,.25);
}
.america-blue {
  position: absolute;
  top: 0;
  left: 0;
  width: 378px;
  height: calc((450px / 13) * 7);
  background-color: #002868;
  z-index: 1;
  padding: 13px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.stripe {
  background-color: white;
  width: 100%;
  height: calc(450px / 13);
}

.stripe:nth-child(1) {
  animation: 1000ms ease 0ms forwards animateDown;
}
.stripe:nth-child(2) {
  animation: 1200ms ease-in-out 0ms forwards animateDown;
}
.stripe:nth-child(3) {
  animation: 1400ms ease-in-out 0ms forwards animateDown;
}
.stripe:nth-child(4) {
  animation: 1600ms ease-in-out 0ms forwards animateDown;
}
.stripe:nth-child(5) {
  animation: 1800ms ease-in-out 0ms forwards animateDown;
}
.stripe:nth-child(6) {
  animation: 2000ms ease-in-out 0ms forwards animateDown;
}

@keyframes animateDown {
  0% {
    margin-top: 0;
  }
  100% {
    margin-top: calc(450px / 13);
  }
}

.star {
  height: 24px;
  width: 24px;
}
.star-row {
  display: flex;
  justify-content: space-between;
}

.star-row:nth-child(1) .star {
  animation: 1000ms ease-in-out 0ms forwards spinMove;
}

.star-row:nth-child(3) .star {
  animation: 1400ms ease-in-out 0ms forwards spinMove;
}

.star-row:nth-child(5) .star {
  animation: 1800ms ease-in-out 0ms forwards spinMove;
}

.star-row:nth-child(7) .star {
  animation: 2000ms ease-in-out 0ms forwards spinMove;
}

.star-row .star:nth-child(6) {
  margin-right: 0;
  animation: 1000ms ease-in-out spin;
}

.star-row-5 {
  display: flex;
  justify-content: space-between;
  padding: 8px 27px;
}

.star-row-5:nth-child(2) .star {
  animation: 1200ms ease-in-out 0ms forwards spinMove;
}
.star-row-5:nth-child(4) .star {
  animation: 1400ms ease-in-out 0ms forwards spinMove;
}
.star-row-5:nth-child(6) .star {
  animation: 1600ms ease-in-out 0ms forwards spinMove;
}
.star-row-5 .star:nth-child(5) {
  margin-right: 0;
  animation: 800ms ease-in-out forwards spin;
}

@keyframes spinMove {
  0% {
    transform: rotate(0deg)
  }
  100% {
    transform: rotate(360deg)
  }
}

@keyframes spin {
  0% {
    transform: rotate(0deg)
  }
  100% {
    transform: rotate(360deg)
  }
}


@media (max-width: 1000px) {
  .america {
    transform: scale(.75);
  }
}
@media (max-width: 725px) {
  .america {
    transform: scale(.5);
  }
}
@media (max-width: 475px) {
  .america {
    transform: scale(.375);
  }
}

@media (max-width: 340px) {
  .america {
    transform: scale(.325);
  }
}
!

JS
!
999px

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