Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

JavaScript

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

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.

Behavior

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.

HTML

              
                .container
  .box1
  .box2
  .box3
              
            
!

CSS

              
                timeFunction = ease-in-out
duration = 4s
delay = 0s

body
  background #333
  display flex
  width 100vw
  height 100vh
  justify-content center
  align-items center
  padding 0px
  margin 0px
  .container
    width 112px
    height 112px
    .box1, .box2, .box3
      border 16px solid #f5f5f5
      box-sizing border-box
      position absolute
      display block
     .box1
       width 112px
       height 48px
       margin-top 64px
       margin-left 0px
       animation anime1 duration delay forwards timeFunction infinite
     .box2
       width 48px
       height 48px
       margin-top 0px
       margin-left 0px
       animation anime2 duration delay forwards timeFunction infinite
     .box3
       width 48px
       height 48px
       margin-top 0px
       margin-left 64px
       animation anime3 duration delay forwards timeFunction infinite
       
       
@keyframes anime1
  0%
    width 112px
    height 48px
    margin-top 64px
    margin-left 0px
  12.5%
    width 48px
    height 48px
    margin-top 64px
    margin-left 0px
  25%
    width 48px
    height 48px
    margin-top 64px
    margin-left 0px
  37.5%
    width 48px
    height 48px
    margin-top 64px
    margin-left 0px
  50%
    width 48px
    height 48px
    margin-top 64px
    margin-left 0px
  62.5%
    width 48px
    height 48px
    margin-top 64px
    margin-left 0px
  75%
    width 48px
    height 112px
    margin-top 0px
    margin-left 0px
  87.5%
    width 48px
    height 48px
    margin-top 0px
    margin-left 0px
  100%
    width 48px
    height 48px
    margin-top 0px
    margin-left 0px
    
    
@keyframes anime2
  0%
    width 48px
    height 48px
    margin-top 0px
    margin-left 0px
  12.5%
    width 48px
    height 48px
    margin-top 0px
    margin-left 0px
  25%
    width 48px
    height 48px
    margin-top 0px
    margin-left 0px
  37.5%
    width 48px
    height 48px
    margin-top 0px
    margin-left 0px
  50%
    width 112px
    height 48px
    margin-top 0px
    margin-left 0px
  62.5%
    width 48px
    height 48px
    margin-top 0px
    margin-left 64px
  75%
    width 48px
    height 48px
    margin-top 0px
    margin-left 64px
  87.5%
    width 48px
    height 48px
    margin-top 0px
    margin-left 64px
  100%
    width 48px
    height 48px
    margin-top 0px
    margin-left 64px
    
@keyframes anime3
  0%
    width 48px
    height 48px
    margin-top 0px
    margin-left 64px
  12.5%
    width 48px
    height 48px
    margin-top 0px
    margin-left 64px
  25%
    width 48px
    height 112px
    margin-top 0px
    margin-left 64px
  37.5%
    width 48px
    height 48px
    margin-top 64px
    margin-left 64px
  50%
    width 48px
    height 48px
    margin-top 64px
    margin-left 64px
  62.5%
    width 48px
    height 48px
    margin-top 64px
    margin-left 64px
  75%
    width 48px
    height 48px
    margin-top 64px
    margin-left 64px
  87.5%
    width 48px
    height 48px
    margin-top 64px
    margin-left 64px
  100%
    width 112px
    height 48px
    margin-top 64px
    margin-left 0px
    

    
              
            
!

JS

              
                
              
            
!
999px

Console