Pen Settings



CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

+ add another resource


Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource


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.


Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.


                <h1 align="center"> Scientists </h1>
<h3 align="center"> Changing lives one step at a time </h3>
<center> <img src= class="img-fluid" alt="Responsive image" align="middle">
<div align="center">
<h3> Time line of events </h3>
  <li> June 29, 2007 Iphone</li>
  <li> September 4, 1998 Google</li>
  <li> 2010 Windows 10</li>
  <li> 2004 Facebook</li>
  <li> 2000 USB Drive</li>
  <li> 2000 GPS</li>
  <li> 1999 Tivo</li>
  <li> 2001 IPOD </li>
  <li> 2006 Nintendo WII </li>
  <li> 1940 Microwave</li>
  <li> 1964 Computer Mouse</li>
  <li> <strong>1955</strong> Remote Control</li>