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HTML

CSS

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HTML

              
                
              
            
!

CSS

              
                @import compass

html
  background: #234

body
  position: fixed
  top: 50%
  left: 50%
  margin: -6px
      
  &, &:before, &:after
    height: 12px
    width: 12px
    background: #969
  
  &:before, &:after
    content: ''
    position: absolute
    top: 0
      
  &:before
    animation: cycle 5s infinite
      
  &:after
    animation: cycle 5s .9s infinite
    
@keyframes cycle
  0%
    top: 0
    left: -120px
  10%
    top: 132px
    left: -120px
  30%
    top: 132px
    left: 132px
  50%
    top: 0
    left: 132px
  60%
    top: -120px
    left: 132px
  80%
    top: -120px
    left: -120px
  90%
    top: 0
    left: -120px
  100%
    top: 0
    left: -120px
  
              
            
!

JS

              
                
              
            
!
999px

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