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              div.wrapper
  div.loader
    div
    div
    div
    div
    div
    div
    div
    div
    div
            
          
!
            
              $boxes: 10
$durationAll: .8s
$duration: - $durationAll / $boxes
$color: salmon

html, body
  height: 100%
  background: #111

.wrapper
  position: absolute
  width: 200px
  height: 2px
  left: 0
  right: 0
  bottom: 0
  top: 0
  margin: auto
  
  
.loader
  height: 100%
  display: flex
  transform: translateZ(0)
  
  div
    flex: 1
    background: #{$color}
    animation: go #{$durationAll} infinite alternate ease
    box-shadow: 0 0 20px #{$color}
    
    @for $i from 1 through $boxes
      &:nth-child(#{$i})
        animation-delay: $duration * ($boxes - $i)
    
@keyframes go
  100%
    background: transparent
    flex: 10
    box-shadow: 0 0 0 transparent
            
          
!
999px
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