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 class="longShad" >Shadow</h1>


                .longShadowMixen (@color, @size){  
  -webkit-text-stroke: .2vw @color;
     font-size: @size;
    padding:50px 0 90px 0; 
    background-color: @color;
    margin: 0;
    text-align: center;
    font-weight: 700;
    color: darken(@color,35%);
         1px -2px 0px lighten(@color,40%), 
        -1px 2px 0px darken(@color,18%), 
        -2px 4px 1px darken(@color,17%), 
        -3px 6px 1px darken(@color,16%), 
        -4px 8px 2px darken(@color,15%), 
        -5px 10px 2px darken(@color,14%), 
        -6px 12px 3px darken(@color,13%), 
        -7px 14px 3px darken(@color,12%), 
        -8px 16px 4px darken(@color,11%), 
        -9px 18px 4px darken(@color,10%), 
        -10px 20px 5px darken(@color,9%), 
        -11px 22px 5px darken(@color,8%), 
        -12px 24px 6px darken(@color,7%), 
        -13px 26px 6px darken(@color,6%), 
        -14px 28px 7px darken(@color,5%), 
        -15px 30px 7px darken(@color,4%), 
        -16px 32px 8px darken(@color,3%), 
        -17px 34px 8px darken(@color,2%), 
        -18px 36px 9px darken(@color,1%), 
        -19px 38px 9px @color

.longShad {
    .longShadowMixen(#27ae60, 20vw);