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HTML

              
                div Loading
              
            
!

CSS

              
                @import compass

// Tested in Chrome only

// Main
body
  background-color: #111
div
  margin: 0 auto
  padding: 5px 0
  position: relative
  font: normal 18px/1em Helvetica, Arial, sans-serif
  text-transform: uppercase
  color: #EFEFEF
  &:after
    content: ''
    @include border-radius(2px)
    @include animation(wormsPong cubic-bezier(0.77, 0, 0.175, 1) .8s infinite)
    background-color: orange
    position: absolute
    bottom: 0
    left: 0
    width: 4px
    height: 4px
      
// Anim
@include keyframes(wormsPong)
  25%
    width: 100%
  50%
    width: 0
    left: auto
    right: 0
  75%
    width: 100%
  100%
    width: 0
    right: auto
    left: 0
  
// Centering
html, body
  height: 100%
div
  position: absolute
  top: 50%
  left: 50%
  @include transform(translate(-50%, -50%))
              
            
!

JS

              
                
              
            
!
999px

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