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HTML

              
                .loading
  .loading-circle.loading-row1.loading-col3
  - for (var i = 2; i <= 4; ++i)
    div(class="loading-circle loading-row2 loading-col#{i}")
  - for (var i = 1; i <= 5; ++i)
    div(class="loading-circle loading-row3 loading-col#{i}")
  - for (var i = 2; i <= 4; ++i)
    div(class="loading-circle loading-row4 loading-col#{i}")
  .loading-circle.loading-row5.loading-col3
              
            
!

CSS

              
                body
  background-color: #00ccff

.loading
  height: 85px
  left: 50%
  margin-left:  -42.5px
  margin-top: -42.5px
  position: absolute
  top: 50%
  transform: translateZ(0)
  width: 85px

.loading-circle
  animation: 2291ms loading infinite
  background-color: #fff
  border-radius: 50%
  height: 14px
  position: absolute
  transform: scale(0)
  width: 14px

for num in (1..13)
  .loading-circle:nth-child({num})
    animation-delay: num * 42ms

.loading-row1
  top: 1.3px

.loading-row2
  top: 18.95px

.loading-row3
  top: 36.55px

.loading-row4
  top: 54.2px

.loading-row5
  top: 71.85px

.loading-col1
  left: 1.25px

.loading-col2
  left: 18.85px

.loading-col3
  left: 36.5px
    
.loading-col4
  left: 54.15px

.loading-col5
  left: 71.8px

@keyframes loading
  0%
    transform: scale(0)
  27.28%
    transform: scale(1)
  36.36%
    transform: scale(0.857)
  54.55%
    transform: scale(0.857)
  63.64%
    transform: scale(0)
  100%
    transform: scale(0)
              
            
!

JS

              
                
              
            
!
999px

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