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A Pen By Captain Anonymous

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.

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HTML

            
              - var n = 1;
  section
    while n <= 50
      div.star(class='star-' + n)
        div
      - n++
!

CSS

            
              // Randomized on every run!

@mixin star($size: 100px, $color: #000, $border-radius: 0) {
  width: $size;
  height: $size;

  div {
    width: $size;
    height: $size;
    position: relative;
    background: $color;
    border-radius: $border-radius;
  }

  div:before, div:after {
    position: absolute;
    top: 0;
    left: 0;
    width: $size;
    height: $size;
    content: '';
    background: $color;
    border-radius: $border-radius;
  }

  div:before { transform: rotate(30deg); }
  div:after  { transform: rotate(60deg); }
}

@keyframes rotate {
  0%   { transform: translateY(-50%) rotate(0deg);   }
  100% { transform: translateY(-50%) rotate(360deg); }
}

$total-elements: 50;          
$starting-size: 400px;  
$size-step: 15px, 10px, 5px;
$border-radius: $starting-size/50, $starting-size/20, $starting-size/10, 0;
$white: #ffffff;
$black: #333;
$gray: #6d6d6d;
$blue: #41A8DF;
$pink: #E72271;
$green: #5fc49e;
$red: #eb5a4f;
$orange: #f8a32c;
$purple: #a65cd4;
$colors: $white, $white, $white, $white, $white, $white, $red, $orange, $purple, $blue;
$durations: 140s, 120s, 100s, 80s;

@for $i from 1 through $total-elements { 
  .star-#{$i} { 
    @include star((($starting-size) - ($i * nth($size-step, random(length($size-step))))), nth($colors, random(length($colors))), nth($border-radius, random(length($border-radius))));
    position: fixed;
    top: 50%;
    right: 0;
    bottom: 0;
    left: 0;
    animation: rotate linear infinite;
    opacity: 1;
    display: block;
    margin: 0 auto;
    z-index: $i;
  }
} 

.star:nth-child(1n) { animation-duration: nth($durations, random(length($durations))); }
.star:nth-child(2n) { animation-duration: nth($durations, random(length($durations))); }
.star:nth-child(3n) { animation-duration: nth($durations, random(length($durations))); }
.star:nth-child(4n) { animation-duration: nth($durations, random(length($durations))); }
.star:nth-child(5n) { animation-duration: nth($durations, random(length($durations))); }

.star:nth-child(3n) { animation-direction: reverse; }
!
999px
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