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HTML 

              
                <header class="words">
  <h1>Spin Cycle</h1>
  <p>Take any simple inline SVG and turn it into a spinner! Branding is super-flexible and set through a Sass mixin.</p>
  <p><b>The only rule is that the things you want to animate have to be DIRECT CHILDREN of the SVG element.</b></p>
</header>

<main class="examples">
  
  <div class="ic-Spin-cycle--classic">
    <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" x="0" y="0" viewBox="156 -189 512 512" enable-background="new 156 -189 512 512" xml:space="preserve">
      <path d="M636 99h-64c-17.7 0-32-14.3-32-32s14.3-32 32-32h64c17.7 0 32 14.3 32 32S653.7 99 636 99z"/>
      <path d="M547.8-23.5C535.2-11 515-11 502.5-23.5s-12.5-32.8 0-45.2l45.2-45.2c12.5-12.5 32.8-12.5 45.2 0s12.5 32.8 0 45.2L547.8-23.5z"/>
      <path d="M412-61c-17.7 0-32-14.3-32-32v-64c0-17.7 14.3-32 32-32s32 14.3 32 32v64C444-75.3 429.7-61 412-61z"/>
      <path d="M276.2-23.5L231-68.8c-12.5-12.5-12.5-32.8 0-45.2s32.8-12.5 45.2 0l45.2 45.2c12.5 12.5 12.5 32.8 0 45.2S288.8-11 276.2-23.5z"/>
      <path d="M284 67c0 17.7-14.3 32-32 32h-64c-17.7 0-32-14.3-32-32s14.3-32 32-32h64C269.7 35 284 49.3 284 67z"/>
      <path d="M276.2 248c-12.5 12.5-32.8 12.5-45.2 0 -12.5-12.5-12.5-32.8 0-45.2l45.2-45.2c12.5-12.5 32.8-12.5 45.2 0s12.5 32.8 0 45.2L276.2 248z"/>
      <path d="M412 323c-17.7 0-32-14.3-32-32v-64c0-17.7 14.3-32 32-32s32 14.3 32 32v64C444 308.7 429.7 323 412 323z"/>
      <path d="M547.8 157.5l45.2 45.2c12.5 12.5 12.5 32.8 0 45.2 -12.5 12.5-32.8 12.5-45.2 0l-45.2-45.2c-12.5-12.5-12.5-32.8 0-45.2S535.2 145 547.8 157.5z"/>
    </svg>
  </div>

  <div class="ic-Spin-cycle--classic-magenta-purple">
    <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" x="0" y="0" viewBox="156 -189 512 512" enable-background="new 156 -189 512 512" xml:space="preserve">
      <path d="M636 99h-64c-17.7 0-32-14.3-32-32s14.3-32 32-32h64c17.7 0 32 14.3 32 32S653.7 99 636 99z"/>
      <path d="M547.8-23.5C535.2-11 515-11 502.5-23.5s-12.5-32.8 0-45.2l45.2-45.2c12.5-12.5 32.8-12.5 45.2 0s12.5 32.8 0 45.2L547.8-23.5z"/>
      <path d="M412-61c-17.7 0-32-14.3-32-32v-64c0-17.7 14.3-32 32-32s32 14.3 32 32v64C444-75.3 429.7-61 412-61z"/>
      <path d="M276.2-23.5L231-68.8c-12.5-12.5-12.5-32.8 0-45.2s32.8-12.5 45.2 0l45.2 45.2c12.5 12.5 12.5 32.8 0 45.2S288.8-11 276.2-23.5z"/>
      <path d="M284 67c0 17.7-14.3 32-32 32h-64c-17.7 0-32-14.3-32-32s14.3-32 32-32h64C269.7 35 284 49.3 284 67z"/>
      <path d="M276.2 248c-12.5 12.5-32.8 12.5-45.2 0 -12.5-12.5-12.5-32.8 0-45.2l45.2-45.2c12.5-12.5 32.8-12.5 45.2 0s12.5 32.8 0 45.2L276.2 248z"/>
      <path d="M412 323c-17.7 0-32-14.3-32-32v-64c0-17.7 14.3-32 32-32s32 14.3 32 32v64C444 308.7 429.7 323 412 323z"/>
      <path d="M547.8 157.5l45.2 45.2c12.5 12.5 12.5 32.8 0 45.2 -12.5 12.5-32.8 12.5-45.2 0l-45.2-45.2c-12.5-12.5-12.5-32.8 0-45.2S535.2 145 547.8 157.5z"/>
    </svg>
  </div>

  <div class="ic-Spin-cycle--circles">
    <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" x="0" y="0" viewBox="0 0 200 79" enable-background="new 0 0 200 79" xml:space="preserve">
      <circle cx="39.5" cy="39.5" r="39.5"/>
      <circle cx="100" cy="39.5" r="39.5"/>
      <circle cx="160.5" cy="39.5" r="39.5"/>
    </svg>
  </div>

  <div class="ic-Spin-cycle--police-car">
    <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" x="0" y="0" viewBox="0 0 200 79" enable-background="new 0 0 200 79" xml:space="preserve">
      <rect y="-0.5" width="33" height="79"/>
      <rect x="33" y="-0.5" width="34" height="79"/>
      <rect x="67" y="-0.5" width="33" height="79"/>
      <rect x="100" y="-0.5" width="33" height="79"/>
      <rect x="133" y="-0.5" width="34" height="79"/>
      <rect x="167" y="-0.5" width="33" height="79"/>
    </svg>
  </div>
  
  <div class="ic-Spin-cycle--faces">
    <svg xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" version="1.1" x="0" y="0" viewBox="195.6 -49.9 600 200" enable-background="new 195.6 -49.9 600 200" xml:space="preserve"><path d="M295.6-38.9c49.1 0 89 39.9 89 89s-39.9 89-89 89 -89-39.9-89-89S246.6-38.9 295.6-38.9M295.6-49.9c-55.2 0-100 44.8-100 100s44.8 100 100 100 100-44.8 100-100S350.9-49.9 295.6-49.9L295.6-49.9zM264.6 11.1c-8.6 0-15.5 6.9-15.5 15.5s6.9 15.5 15.5 15.5 15.5-6.9 15.5-15.5S273.2 11.1 264.6 11.1zM326.6 11.1c-8.6 0-15.5 6.9-15.5 15.5s6.9 15.5 15.5 15.5 15.5-6.9 15.5-15.5S335.2 11.1 326.6 11.1zM295.6 68.1c-10.6 0-19.2 6.7-19.2 15s8.6 15 19.2 15 19.2-6.7 19.2-15S306.2 68.1 295.6 68.1z"/><path d="M495.6-38.9c49.1 0 89 39.9 89 89s-39.9 89-89 89 -89-39.9-89-89S446.6-38.9 495.6-38.9M495.6-49.9c-55.2 0-100 44.8-100 100s44.8 100 100 100 100-44.8 100-100S550.9-49.9 495.6-49.9L495.6-49.9zM464.6 11.1c-8.6 0-15.5 6.9-15.5 15.5s6.9 15.5 15.5 15.5 15.5-6.9 15.5-15.5S473.2 11.1 464.6 11.1zM526.6 11.1c-8.6 0-15.5 6.9-15.5 15.5s6.9 15.5 15.5 15.5c8.6 0 15.5-6.9 15.5-15.5S535.2 11.1 526.6 11.1zM495.6 68.1c-10.6 0-19.2 6.7-19.2 15s8.6 15 19.2 15 19.2-6.7 19.2-15S506.2 68.1 495.6 68.1z"/><path d="M695.6-38.9c49.1 0 89 39.9 89 89s-39.9 89-89 89 -89-39.9-89-89S646.6-38.9 695.6-38.9M695.6-49.9c-55.2 0-100 44.8-100 100s44.8 100 100 100c55.2 0 100-44.8 100-100S750.9-49.9 695.6-49.9L695.6-49.9zM664.6 11.1c-8.6 0-15.5 6.9-15.5 15.5s6.9 15.5 15.5 15.5c8.6 0 15.5-6.9 15.5-15.5S673.2 11.1 664.6 11.1zM726.6 11.1c-8.6 0-15.5 6.9-15.5 15.5s6.9 15.5 15.5 15.5c8.6 0 15.5-6.9 15.5-15.5S735.2 11.1 726.6 11.1zM695.6 68.1c-10.6 0-19.2 6.7-19.2 15s8.6 15 19.2 15c10.6 0 19.2-6.7 19.2-15S706.2 68.1 695.6 68.1z"/></svg>
  </div>
  
</main>
!

CSS 

              
                // *** Start Spin Cycle code ***
@mixin ic-Spin-cycle-animation (
    $animation-name: spin-cycle,
    $animation-grow-to: 1,
    $animation-shrink-to: 1,
    $color-spin-highlight: #5f5ffe,
    $color-spin-base: black
  ) {
    @keyframes #{$animation-name} {
    from { 
      fill: $color-spin-highlight;
      transform: scale($animation-grow-to);
    }
    to {
      fill: $color-spin-base;
      transform: scale($animation-shrink-to);
    }
  }  
}

@mixin ic-Spin-cycle-branding(
    $animation-name: spin-cycle,
    $animation-grow-to: 1,
    $animation-shrink-to: 1,
    $spin-width: 72px,
    $spin-height: 72px,
    $spin-margin: 12px 24px,
    $color-spin-base: rgba(white, 0),
    $color-spin-highlight: #5f5ffe,
    $number-of-paths: 8
  ) {
  @include ic-Spin-cycle-animation($animation-name, $animation-grow-to, $animation-shrink-to, $color-spin-highlight, $color-spin-base);
  margin: $spin-margin;
  width: $spin-width;
  height: $spin-height;
  > svg {
    width: $spin-width; height: $spin-height;
    > * {
      fill: $color-spin-base;
      animation-name: $animation-name;
      animation-duration: #{$number-of-paths*0.1}s;
      @for $i from 1 through ($number-of-paths) {        
        &:nth-of-type(#{$i}) {
          animation-delay: #{$i*0.1}s;
        }
      }  
    }
  }
}

%ic-Spin-cycle {
  box-sizing: border-box;
  display: inline-block;
  vertical-align: middle;
  overflow: visible;
  > svg {
    display: block;
    overflow: visible;
    > * {
      transform: translate3d(0,0,0);
      transform-origin: center;
      animation-iteration-count: infinite;
    }
  }
}

// Let's make some spinners!

.ic-Spin-cycle--classic {
  @extend %ic-Spin-cycle;
  // pass no parameters into the mixin, and you get a classic spinner
  @include ic-Spin-cycle-branding;
}

.ic-Spin-cycle--classic-magenta-purple {
  @extend %ic-Spin-cycle;
  @include ic-Spin-cycle-branding(
    yellow, // name your animation
    1, // how BIG should the child paths scale to?
    1, // how SMALL should the child paths scale to?
    72px, // what is the width of the spinner?
    72px, // what is the height of the spinner?
    12px 24px, // what margin should be around the spinner element?
    #5f5ffe, // what is the base color of the spinner?
    #ef0878, // what is the highlight color of the spinner?
    8 // how many direct child paths/circles/etc. does the SVG have? Feel free to play with this to make the timing of the animation slower or faster.
    );
}
  
.ic-Spin-cycle--circles {
  @extend %ic-Spin-cycle;
  @include ic-Spin-cycle-branding(
    circles, // name your animation
    1.5, // how BIG should the child paths scale to?
    1, // how SMALL should the child paths scale to?
    100px, // what is the width of the spinner?
    72px, // what is the height of the spinner?
    12px 24px, // what margin should be around the spinner element?
    rgba(#5f5ffe,0.5), // what is the base color of the spinner?
    rgba(#5f5ffe, 0.8), // what is the highlight color of the spinner?
    8 // how many direct child paths/circles/etc. does the SVG have? Feel free to play with this to make the timing of the animation slower or faster.
    );
}

.ic-Spin-cycle--police-car {
  @extend %ic-Spin-cycle;
  @include ic-Spin-cycle-branding(
    your-animation, // name your animation
    1.1, // how BIG should the child paths scale to?
    0.9, // how SMALL should the child paths scale to?
    100px, // what is the width of the spinner?
    72px, // what is the height of the spinner?
    12px 24px, // what margin should be around the spinner element?
    rgba(#222, 0.8), // what is the base color of the spinner?
    #5f5ffe,  // what is the highlight color of the spinner?
    8 // how many direct child paths/circles/etc. does the SVG have? Feel free to play with this to make the timing of the animation slower or faster.
    );
}

.ic-Spin-cycle--faces {
  @extend %ic-Spin-cycle;
  @include ic-Spin-cycle-branding(
    faces, // name your animation
    1.25, // how BIG should the child paths scale to?
    1, // how SMALL should the child paths scale to?
    100px, // what is the width of the spinner?
    72px, // what is the height of the spinner?
    12px 24px, // what margin should be around the spinner element?
    rgba(#5f5ffe, 0.7), // what is the base color of the spinner?
    rgba(#ef0878, 0.8), // what is the highlight color of the spinner?
    12 // how many direct child paths/circles/etc. does the SVG have? Feel free to play with this to make the timing of the animation slower or faster.
    );
}
// *** End Spin Cycle code ***



:root { background: #222; height: 100%; }
body { text-align: center; height: 100%; color: #111; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol"; }
.words { text-align: left; box-sizing: border-box; padding: 24px; line-height: 1.5; background: #7070fe; margin-bottom: 48px; h1 { color: white; margin-top: 0;}}
.examples { flex: 1; text-align: center; }
!

JS
!
999px

Console