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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              @import compass

*
  margin: 0
  padding: 0
  box-sizing: border-box
  
html, body 
  height: 100%
 
.loader
  width: 400px
  height: 40px
  background-color: #ddd
  top: 50%
  left: 50%
  margin: -40px -200px
  position: absolute
  border-radius: 100px
  box-shadow: inset 0 0 0 2px rgba(0,0,0,.05)


.loader:after
  border-radius: 100px
  content: ''
  position: absolute
  background-color: #fff
  left: 2px
  top: 2px
  bottom: 2px
  right: 360px
  animation-name: slide
  animation-duration: 2s
  animation-easing-function: linear
  animation-iteration-count: infinite  
  box-shadow: 0 1px 2px rgba(0,0,0,.2)
    
@keyframes slide
  0%
    right: 360px
    left: 2px
  
  5%
    left: 2px
  
  50%
    right: 2px
    left: 360px
  
  55%
    right: 2px
  
  100%
    right: 360px
    left: 2px

            
          
!
999px
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