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HTML

              
                .banner
  .flower
    - for i in 1..9
      .petal
              
            
!

CSS

              
                @import compass

$radius: 30px
$petals: 9 // if you want more than 9, change the Slim loop
$flowercolor: #3498db

$circumference: 2 * pi() * $radius  
$width: ceil($circumference / $petals / 2)      
// height and half-width of rounded part
$h: $radius/sqrt(2)
$w: $width/sqrt(2)

.banner, .flower
  position: absolute
  top: 50%
  left: 50%
  height: $radius * 2
  width: $radius * 2
  margin: -$radius
    
.banner
  text-align: center
  p
    position: relative
    font: 36px/#{$radius*2} Allerta, sans-serif
    color: white
    &:first-letter
      margin-right: .25em
      vertical-align: super
      font-size: .5em

.flower
  padding: $radius - sqrt(pow($h,2) + pow($w,2))
  
  box-sizing: border-box
  background-clip: content-box
  background-color: $flowercolor

  +border-radius(50%)
  +transform-origin($radius $radius, false)
  -webkit-animation: spin 20s linear infinite
  animation: spin 20s linear infinite
      
.petal
  top: 0
  left: $radius - $width
  border-top: $radius solid $flowercolor
  border-left: $width solid transparent
  border-right: $width solid transparent
  position: absolute
    
  +border-radius(50% 50% 0 0 / 100% 100% 0 0)
  +transform-origin(50% 100%, false)
  
  @for $i from 1 through $petals
    &:nth-child(#{$i})
      +rotate(#{$i*360/$petals}deg)
        
@-webkit-keyframes spin
  from
    +rotate(0)
  to
    +rotate(360deg)
      
@keyframes spin
  from
    +rotate(0)
  to
    +rotate(360deg)
              
            
!

JS

              
                
              
            
!
999px

Console