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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-.

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

Add External Stylesheets/Pens

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About External Resources

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

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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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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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About Packages

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

All packages are different, so refer to their docs for how they work.

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HTML 

              
                <!-- svg #1 -->
<svg class="circle-chart chart1" width="300" height="300"  xmlns="http://www.w3.org/2000/svg">
      <circle class="pie" stroke="#4285f4" stroke-width="20" stroke-dasharray="300,0" stroke-linecap="round" fill="none" cx="0" cy="0" r="63.66197723675813" />
          <text class="text" x="16" y="15.5" alignment-baseline="central" text-anchor="middle" font-size="1em">#1</text>
</svg>
<!-- svg #2 -->
<svg class="circle-chart chart2" width="300" height="300" viewBox="-73.66197723675813 -73.66197723675813 300 300" xmlns="http://www.w3.org/2000/svg">
      <circle class="pie" stroke="#4285f4" stroke-width="20" stroke-dasharray="300,0" stroke-linecap="round" fill="none" cx="0" cy="0" r="63.66197723675813" />
          <text class="text" x="0" y="0" alignment-baseline="central" text-anchor="middle" font-size="3em">#2</text>
</svg>

<!-- svg #3 -->
<svg class="circle-chart chart3" width="300" height="300" viewBox="-150 -150 300 300" xmlns="http://www.w3.org/2000/svg">
      <circle class="pie" stroke="#4285f4" stroke-width="20" stroke-dasharray="300,0" stroke-linecap="round" fill="none" cx="0" cy="0" r="63.66197723675813" />
          <text class="text" x="0" y="0" alignment-baseline="central" text-anchor="middle" font-size="3em">#3</text>
</svg>
<!-- svg #4 -->
<svg class="circle-chart chart4" width="300" height="300" viewBox="-150 -150 300 300" xmlns="http://www.w3.org/2000/svg">
      <circle class="pie" stroke-linecap="round" fill="none" cx="0" cy="0" r="63.66197723675813" />
          <text class="text" x="0" y="0" alignment-baseline="central" text-anchor="middle" font-size="3em">#4</text>
</svg>
<!-- svg #5 -->
<svg class="circle-chart chart5" width="300" height="300" viewBox="-150 -150 300 300" xmlns="http://www.w3.org/2000/svg">
      <circle id="chart5" class="pie" stroke-linecap="round" fill="none" cx="0" cy="0" r="63.66197723675813" />
 <animate 
           xlink:href="#chart5"
           attributeName="stroke-dashoffset"
           from="-400"
           to="0" 
           dur="6s"
           fill="remove"
           repeatCount="indefinite"
     />
     <text class="text" x="0" y="0" alignment-baseline="central" text-anchor="middle" font-size="3em">#5</text>
</svg>

<!-- svg #6 -->
<svg class="circle-chart chart6" width="300" height="300" viewBox="-150 -150 300 300" xmlns="http://www.w3.org/2000/svg">
   <circle class="pie1" stroke-linecap="butt" stroke="#c73e3c" fill="none" cx="0" cy="0" r="63.66197723675813" />
   <circle class="pie2" stroke-linecap="butt" stroke="#364f5e" fill="none" cx="0" cy="0" r="63.66197723675813" />
   <circle class="pie3" stroke-linecap="butt" stroke="#6eaab0" fill="none" cx="0" cy="0" r="63.66197723675813" />
   <circle class="pie4" stroke-linecap="butt" stroke="#d88d73" fill="none" cx="0" cy="0" r="63.66197723675813" />
   <circle class="pie5" stroke-linecap="butt" stroke="#9dcdb7" fill="none" cx="0" cy="0" r="63.66197723675813" />
   <text class="text" x="0" y="0" alignment-baseline="central" text-anchor="middle" font-size="3em">#6</text>
</svg>

<!-- svg #6 -->
<!-- <svg class="circle-chart chart7" width="300" height="300" viewBox="-150 -150 300 300" xmlns="http://www.w3.org/2000/svg">
      <circle id="chart7" class="pie" stroke-linecap="round" fill="none" cx="0" cy="0" r="63.66197723675813" />
     <text class="text" x="0" y="0" alignment-baseline="central" text-anchor="middle" font-size="3em">#7
  </text>
</svg> -->
!

CSS 

              
                body { 
  font-family: sans-serif;
  background: lightgray; 
  max-resolution: 10 auto;
}

svg {
  border: 10px solid #fff;
}

.chart4 circle {
  stroke: #4285f4;
  stroke-width: 20;
  stroke-dasharray: 400;
  stroke-dashoffset: 400;
  -webkit-animation:  fillup 5s linear infinite;
  animation: fillup 3s linear 1s infinite;
}

@-webkit-keyframes fillup {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes fillup {
  to {
    stroke-dashoffset: 0;
  }
}
.chart5 circle {
  stroke: #4285f4;
  stroke-width: 20;
  stroke-dasharray: 400;
  stroke-dashoffset: 0;
}

.chart6 circle {
  transform:rotate(-90deg);
  stroke-width: 20;
/*   -webkit-animation:  fillup 5s linear infinite;
  animation: fillup 3s linear 1s infinite; */
}

.chart6 circle.pie1{
  stroke-dasharray: 52.30288836846214 347.69711163153784;
  stroke-dashoffset: 0;
}
.chart6 circle.pie2 {
  stroke-dasharray: 48.39968774395004 351.60031225604996;
  stroke-dashoffset: 347.69711163153784;
}
.chart6 circle.pie3 {
  stroke-dasharray: 36.53395784543326 363.46604215456676;
  stroke-dashoffset: 299.2974238875878;
}

.chart6 circle.pie4 {
  stroke-dasharray: 21.07728337236534 378.92271662763466;
  stroke-dashoffset: 262.76346604215456;
}

.chart6 circle.pie5 {
  stroke-dasharray: 241.68618266978922 158.31381733021078;
  stroke-dashoffset: 241.68618266978922;
}

.chart7 circle {
  stroke: #4285f4;
  stroke-width: 20;
  stroke-dasharray: 400;
  stroke-dashoffset: 0;
}
!

JS 

              
                // magic
!
999px

Console