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HTML

              
                <div class="table">
  <div class="table-cell">
    <div class="container">
      <div class="card">
        <a class="btn" href="https://codepen.io/Anna_Batura/" target="_blank">
          Button
        </a>
      </div>
      <svg class="svg-1" width="147px" height="148px" viewBox="0 0 147 148" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <defs>
        <filter x="-50%" y="-50%" width="200%" height="200%" filterUnits="objectBoundingBox" id="filter-1">
            <feOffset dx="0" dy="5" in="SourceAlpha" result="shadowOffsetOuter1"></feOffset>
            <feGaussianBlur stdDeviation="15" in="shadowOffsetOuter1" result="shadowBlurOuter1"></feGaussianBlur>
            <feColorMatrix values="0 0 0 0 0.266666667   0 0 0 0 0.694117647   0 0 0 0 0.607843137  0 0 0 0.7 0" in="shadowBlurOuter1" type="matrix" result="shadowMatrixOuter1"></feColorMatrix>
            <feMerge>
                <feMergeNode in="shadowMatrixOuter1"></feMergeNode>
                <feMergeNode in="SourceGraphic"></feMergeNode>
            </feMerge>
        </filter>
    </defs>
    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd" filter="url(#filter-1)">
        <g id="Artboard-1" transform="translate(-146.000000, -3.000000)" fill="#44B19B">
            <g id="tr1" transform="translate(218.000000, 72.000000) scale(-1, -1) translate(-218.000000, -72.000000) translate(169.000000, 22.000000)">
                <path d="M45.1796875,76.9648438 L0.58984375,100 L20,0 L45.1796875,76.9648438 Z" id="Triangle-1" fill-opacity="0.423318614"></path>
                <path d="M97.1992188,79.2382812 L18.9960938,0 L40,62 L97.1992188,79.2382812 Z" id="Triangle-1"></path>
            </g>
        </g>
    </g>
</svg>

<svg class="svg-2" width="150px" height="130px" viewBox="0 0 150 130" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <defs>
        <filter x="-50%" y="-50%" width="200%" height="200%" filterUnits="objectBoundingBox" id="filter-1">
            <feOffset dx="0" dy="5" in="SourceAlpha" result="shadowOffsetOuter1"></feOffset>
            <feGaussianBlur stdDeviation="15" in="shadowOffsetOuter1" result="shadowBlurOuter1"></feGaussianBlur>
            <feColorMatrix values="0 0 0 0 0.729411765   0 0 0 0 0.247058824   0 0 0 0 0.341176471  0 0 0 0.543447124 0" in="shadowBlurOuter1" type="matrix" result="shadowMatrixOuter1"></feColorMatrix>
            <feMerge>
                <feMergeNode in="shadowMatrixOuter1"></feMergeNode>
                <feMergeNode in="SourceGraphic"></feMergeNode>
            </feMerge>
        </filter>
    </defs>
    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd" filter="url(#filter-1)">
        <g id="Artboard-1" transform="translate(-124.000000, -151.000000)" fill="#BA3F57">
            <g id="tr2" transform="translate(202.000000, 211.000000) scale(1, -1) translate(-202.000000, -211.000000) translate(151.000000, 171.000000)">
                <polygon id="Triangle-1" fill-opacity="0.831946332" points="23 0 44 62 0 62 "></polygon>
                <path d="M101.199219,79.2382812 L22.9960938,0 L44,62 L101.199219,79.2382812 Z" id="Triangle-1" fill-opacity="0.554376132"></path>
            </g>
        </g>
    </g>
</svg>

<svg class="svg-3" width="154px" height="139px" viewBox="0 0 154 139" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <defs>
        <filter x="-50%" y="-50%" width="200%" height="200%" filterUnits="objectBoundingBox" id="filter-1">
            <feOffset dx="0" dy="5" in="SourceAlpha" result="shadowOffsetOuter1"></feOffset>
            <feGaussianBlur stdDeviation="15" in="shadowOffsetOuter1" result="shadowBlurOuter1"></feGaussianBlur>
            <feColorMatrix values="0 0 0 0 0.568627451   0 0 0 0 0.631372549   0 0 0 0 0.968627451  0 0 0 0.7 0" in="shadowBlurOuter1" type="matrix" result="shadowMatrixOuter1"></feColorMatrix>
            <feMerge>
                <feMergeNode in="shadowMatrixOuter1"></feMergeNode>
                <feMergeNode in="SourceGraphic"></feMergeNode>
            </feMerge>
        </filter>
    </defs>
    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd" filter="url(#filter-1)">
        <g id="Artboard-1" transform="translate(-3.000000, -50.000000)" fill="#91A1F7">
            <g id="tr3" transform="translate(30.000000, 72.000000)">
                <polygon id="Triangle-1" points="22 20 44 82 0 82 "></polygon>
                <path d="M103,0 L21.4453125,19.0859375 L44,82 L103,0 Z" id="Triangle-1" fill-opacity="0.62720788"></path>
            </g>
        </g>
    </g>
</svg>
    </div>
  </div>
</div>
<svg class="svg-3 svg-b" width="154px" height="139px" viewBox="0 0 154 139" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <defs>
        <filter x="-50%" y="-50%" width="200%" height="200%" filterUnits="objectBoundingBox" id="filter-1">
            <feOffset dx="0" dy="5" in="SourceAlpha" result="shadowOffsetOuter1"></feOffset>
            <feGaussianBlur stdDeviation="15" in="shadowOffsetOuter1" result="shadowBlurOuter1"></feGaussianBlur>
            <feColorMatrix values="0 0 0 0 0.568627451   0 0 0 0 0.631372549   0 0 0 0 0.968627451  0 0 0 0.7 0" in="shadowBlurOuter1" type="matrix" result="shadowMatrixOuter1"></feColorMatrix>
            <feMerge>
                <feMergeNode in="shadowMatrixOuter1"></feMergeNode>
                <feMergeNode in="SourceGraphic"></feMergeNode>
            </feMerge>
        </filter>
    </defs>
    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd" filter="url(#filter-1)">
        <g id="Artboard-1" transform="translate(-3.000000, -50.000000)" fill="#91A1F7">
            <g id="tr3" transform="translate(30.000000, 72.000000)">
                <polygon id="Triangle-1" points="22 20 44 82 0 82 "></polygon>
                <path d="M103,0 L21.4453125,19.0859375 L44,82 L103,0 Z" id="Triangle-1" fill-opacity="0.62720788"></path>
            </g>
        </g>
    </g>
</svg>
<svg class="svg-2 svg-b" width="150px" height="130px" viewBox="0 0 150 130" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <defs>
        <filter x="-50%" y="-50%" width="200%" height="200%" filterUnits="objectBoundingBox" id="filter-1">
            <feOffset dx="0" dy="5" in="SourceAlpha" result="shadowOffsetOuter1"></feOffset>
            <feGaussianBlur stdDeviation="15" in="shadowOffsetOuter1" result="shadowBlurOuter1"></feGaussianBlur>
            <feColorMatrix values="0 0 0 0 0.729411765   0 0 0 0 0.247058824   0 0 0 0 0.341176471  0 0 0 0.543447124 0" in="shadowBlurOuter1" type="matrix" result="shadowMatrixOuter1"></feColorMatrix>
            <feMerge>
                <feMergeNode in="shadowMatrixOuter1"></feMergeNode>
                <feMergeNode in="SourceGraphic"></feMergeNode>
            </feMerge>
        </filter>
    </defs>
    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd" filter="url(#filter-1)">
        <g id="Artboard-1" transform="translate(-124.000000, -151.000000)" fill="#BA3F57">
            <g id="tr2" transform="translate(202.000000, 211.000000) scale(1, -1) translate(-202.000000, -211.000000) translate(151.000000, 171.000000)">
                <polygon id="Triangle-1" fill-opacity="0.831946332" points="23 0 44 62 0 62 "></polygon>
                <path d="M101.199219,79.2382812 L22.9960938,0 L44,62 L101.199219,79.2382812 Z" id="Triangle-1" fill-opacity="0.554376132"></path>
            </g>
        </g>
    </g>
</svg>
              
            
!

CSS

              
                @import "compass"
@import url(https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz:400,700,300)

=keyframes($animation-name)
  @-webkit-keyframes #{$animation-name}
    @content
  @-moz-keyframes #{$animation-name}
    @content
  @keyframes #{$animation-name}
    @content

body
  background-color: #0F142A
  height: 100vh
  overflow: hidden
  text-align: center
  font-family: 'Yanone Kaffeesatz', sans-serif
.table
  display: table
  width: 100%
  height: 100%
.table-cell
  display: table-cell
  vertical-align: middle
.container
  position: relative
  width: 300px
  max-width: 100%
  margin: 0px auto
  background-color: #161C33
.card
  overflow: hidden
  .btn
    background-color: #0F142A
    display: block
    text-decoration: none
    position: relative
    cursor: pointer
    width: 55%
    margin: 80px auto
    font-size: 30px
    color: #44B19B
    line-height: 50px
    height: 50px
    border: 3px solid rgba(79, 117, 128, 0.5)
    z-index: 1
    @include transition(all 0.3s)
    &:hover
      border-radius: 10px
      box-shadow: 0 0 14px 1px #A74C64, 0 0 70px 10px #91A1F7, 0 0 126px 23px #45B19B

svg
  z-index: 2
    
.svg-1, .svg-2, .svg-3
  position: absolute
  top: 20px
  left: -135px
  @include transition(all 0.3s)
.svg-1
  @include animation(fly-1 10s infinite ease-in-out)  
.svg-2
  top: 80px
  left: 308px
  @include animation(fly-2 7s infinite ease-in-out)  
.svg-3
  top: 160px
  left: 100px
  @include animation(fly-3 5s alternate infinite ease-in-out)
    
.svg-b
  opacity: 0.2
  @include scale( 5.1 )
  top: -50px
  left: 30px
  @include animation(fly-4 10s alternate infinite ease-in-out)
.svg-2.svg-b
  top: auto
  bottom: -124px
  left: auto
  right: -24px
  
+keyframes(fly-1)
  50%
    @include rotate(12deg)
+keyframes(fly-2)
  50%
    @include rotate(-10deg)
+keyframes(fly-3)
  50%
    @include rotate(4deg)
+keyframes(fly-4)
  50%
    @include scale(5.2)


              
            
!

JS

              
                
              
            
!
999px

Console