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HTML

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CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

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About Vendor Prefixing

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <div id="background-wrap">
    
  <div class="x x1"><div class="inner"><div class="bubble"></div></div></div>
  <div class="x x2"><div class="inner"><div class="bubble"></div></div></div>
  <div class="x x3"><div class="inner"><div class="bubble"></div></div></div>
  <div class="x x4"><div class="inner"><div class="bubble"></div></div></div>
  <div class="x x5"><div class="inner"><div class="bubble"></div></div></div>
  <div class="x x6"><div class="inner"><div class="bubble"></div></div></div>
  <div class="x x7"><div class="inner"><div class="bubble"></div></div></div>
  <div class="x x8"><div class="inner"><div class="bubble"></div></div></div>
  <div class="x x9"><div class="inner"><div class="bubble"></div></div></div>
  <div class="x x10"><div class="inner"><div class="bubble"></div></div></div>
    
</div>
<svg class="jellyfish" viewBox="-100 -100 556 785" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <title>Jellyfish</title>
    <defs>
      <filter id="turbulence-1">
    <feTurbulence type="fractalNoise" baseFrequency="0.001" numOctaves="2" data-filterId="3" />
    <feDisplacementMap xChannelSelector="R" yChannelSelector="G" in="SourceGraphic" scale="100" />
  </filter>

  <filter id="turbulence-2">
    <feTurbulence type="fractalNoise" baseFrequency="0.0015" numOctaves="2" data-filterId="3" />
    <feDisplacementMap xChannelSelector="R" yChannelSelector="G" in="SourceGraphic" scale="100" />
  </filter>

  <filter id="turbulence-3">
    <feTurbulence type="fractalNoise" baseFrequency="0.002" numOctaves="2" data-filterId="3" />
    <feDisplacementMap xChannelSelector="R" yChannelSelector="G" in="SourceGraphic" scale="100" />
  </filter>

  <filter id="turbulence-4">
    <feTurbulence type="fractalNoise" baseFrequency="0.0025" numOctaves="2" data-filterId="3" />
    <feDisplacementMap xChannelSelector="R" yChannelSelector="G" in="SourceGraphic" scale="100" />
  </filter>

  <filter id="turbulence-5">
    <feTurbulence type="fractalNoise" baseFrequency="0.003" numOctaves="2" data-filterId="3" />
    <feDisplacementMap xChannelSelector="R" yChannelSelector="G" in="SourceGraphic" scale="100" />
  </filter>
        <radialGradient cx="52.8919822%" cy="37.1312567%" fx="52.8919822%" fy="37.1312567%" r="102.335451%" gradientTransform="translate(0.528920,0.371313),scale(0.337875,1.000000),rotate(77.735795),translate(-0.528920,-0.371313)" id="radialGradient-1">
            <stop stop-color="#B45082" offset="0%"></stop>
            <stop stop-color="#CF4A8D" offset="0%"></stop>
            <stop stop-color="#884F6C" offset="100%"></stop>
        </radialGradient>
        <radialGradient cx="50%" cy="1.20618666%" fx="50%" fy="1.20618666%" r="95.8716333%" gradientTransform="translate(0.500000,0.012062),scale(0.576923,1.000000),rotate(85.798877),translate(-0.500000,-0.012062)" id="radialGradient-2">
            <stop stop-color="#FF5EAF" offset="0%"></stop>
            <stop stop-color="#BF2547" offset="100%"></stop>
        </radialGradient>
    </defs>
    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
        <g id="Desktop-HD" transform="translate(-502.000000, -201.000000)">
            <g id="Group-2" transform="translate(512.000000, 211.000000)">
                <path class="tentacle" d="M113.5,204.5 C90.1835023,277.765192 77.8028382,314.608942 76.3580079,335.03125 C72.5804209,388.426479 99.4101176,423.051732 90.3843355,454.304 C82.1558109,482.795719 43.9168527,496.408367 25,528.401492 C15.8418761,543.890168 7.50854276,573.58967 0,617.5" id="tentacle-left" stroke="#AF335D" stroke-width="10" stroke-linecap="round"></path>
                <path class="tentacle" d="M321.706715,198.306678 C277.128036,258.890751 253.457516,300.797001 250.695153,324.025428 C243.472806,384.757406 294.768349,424.140327 277.512008,459.686799 C261.779939,492.093412 188.671094,507.576499 152.504072,543.965626 C134.994707,561.582517 119.062255,595.362868 104.706715,645.306678" id="tentacle-center" stroke="#AF335D" stroke-width="10" stroke-linecap="round" transform="translate(213.206715, 421.806678) rotate(-30.000000) translate(-213.206715, -421.806678) "></path>
                <path class="tentacle" d="M359.784264,141.43842 C340.268253,188.604544 329.905583,221.229544 328.696253,239.31342 C325.534396,286.594692 347.990971,317.255221 340.436351,344.928985 C333.54904,370.158294 301.542864,382.212241 285.709375,410.542031 C278.043984,424.257195 271.068948,450.555991 264.784264,489.43842" id="tentacle-right" stroke="#AF335D" stroke-width="10" stroke-linecap="round" transform="translate(312.284264, 315.438420) rotate(-30.000000) translate(-312.284264, -315.438420) "></path>
                <g id="body">
                    <path d="M208.5,212.083775 C309.844252,212.083775 392,251.257956 392,198.153722 C392,145.049488 309.844252,102 208.5,102 C107.155748,102 25,145.049488 25,198.153722 C25,251.257956 107.155748,212.083775 208.5,212.083775 Z" id="body-inner" fill="url(#radialGradient-1)"></path>
                    <path d="M208,218.065372 C179.309685,218.065372 152.610497,222.301538 114.13249,231.398546 C109.980399,232.380188 93.8901735,236.260654 90.0129711,237.175351 C81.0710195,239.284906 74.2467799,240.780084 67.951037,241.967199 C52.2466132,244.928399 40.4364784,245.790864 30.5677903,244.264843 C6.52746158,240.547425 -5,222.425351 -5,186.103978 C-5,80.4285638 90.4796424,-5 208,-5 C325.520358,-5 421,80.4285638 421,186.103978 C421,222.425351 409.472538,240.547425 385.43221,244.264843 C375.563522,245.790864 363.753387,244.928399 348.048963,241.967199 C341.75322,240.780084 334.928981,239.284906 325.987029,237.175351 C322.109827,236.260654 306.019601,232.380188 301.86751,231.398546 C263.389503,222.301538 236.690315,218.065372 208,218.065372 Z" id="body-outer" stroke-opacity="0.1" stroke="#000000" stroke-width="10" fill-opacity="0.8" fill="url(#radialGradient-2)"></path>
                </g>
            </g>
        </g>
    </g>
</svg>
!

CSS 

              
                html {
  background-image: linear-gradient(to top, black, gray);
}
body {
  display: grid;
  min-height: 100vh;
  justify-content: center;
  align-content: center;
  background-image: linear-gradient(
    to right top,
    rgba(50, 157, 209, 0.5),
    rgba(76, 188, 136, 0.75)
  );
  margin: 0;
}

#body-outer {
  opacity: 0.6;
}

#background-wrap {
  bottom: 0;
  left: 0;
  position: fixed;
  right: 0;
  top: 0;
  opacity: 0.75;
  z-index: 2;
}

.bubble {
  border-radius: 50%;
  box-shadow: 0 20px 30px rgba(0, 0, 0, 0.1),
    inset 0px 10px 30px 5px rgba(255, 255, 255, 1);

  height: 200px;
  width: 200px;
}

.bubble:after {
  background: radial-gradient(
    ellipse at center,
    rgba(255, 255, 255, 0.5) 0%,
    rgba(255, 255, 255, 0) 70%
  );

  border-radius: 50%;

  content: "";
  height: 180px;
  left: 10px;
  position: absolute;
  width: 180px;
}

@keyframes animateBubble {
  0% {
    transform: translateY(300vh);
    opacity: 0.75;
  }
  100% {
    transform: translateY(-200vh);
    opacity: 0;
  }
}

@keyframes sideWays {
  0% {
    transform: translateX(-50px);
  }
  100% {
    transform: translateX(50px);
  }
}

.x {
  position: fixed;
}

.x1 {
  .inner {
    animation: sideWays 2s ease-in-out infinite alternate;
  }
  .bubble {
    animation: animateBubble 25s linear infinite;
  }

  left: -5%;
  top: 5%;

  transform: scale(0.6);
}

.x2 {
  .inner {
    animation: sideWays 4s ease-in-out infinite alternate;
  }
  .bubble {
    animation: animateBubble 20s linear infinite;
  }

  left: 5%;
  top: 80%;
  transform: scale(0.4);
}

.x3 {
  .inner {
    animation: sideWays 2s ease-in-out infinite alternate;
  }
  .bubble {
    animation: animateBubble 28s linear infinite;
  }

  left: 10%;
  top: 40%;

  transform: scale(0.7);
}

.x4 {
  .inner {
    animation: sideWays 3s ease-in-out infinite alternate;
  }
  .bubble {
    animation: animateBubble 22s linear infinite;
  }

  left: 20%;
  top: 0;

  transform: scale(0.3);
}

.x5 {
  .inner {
    animation: sideWays 4s ease-in-out infinite alternate;
  }
  .bubble {
    animation: animateBubble 29s linear infinite;
  }

  left: 30%;
  top: 50%;

  transform: scale(0.5);
}

.x6 {
  .inner {
    animation: sideWays 2s ease-in-out infinite alternate;
  }
  .bubble {
    animation: animateBubble 21s linear infinite;
  }

  left: 50%;
  top: 0;

  transform: scale(0.8);
}

.x7 {
  .inner {
    animation: sideWays 2s ease-in-out infinite alternate;
  }
  .bubble {
    animation: animateBubble 20s linear infinite;
  }

  left: 65%;
  top: 70%;
  z-index: 9;

  transform: scale(0.4);
}

.x8 {
  .inner {
    animation: sideWays 4s ease-in-out infinite alternate;
  }
  .bubble {
    animation: animateBubble 22s linear infinite;
  }

  left: 80%;
  top: 15%;

  transform: scale(0.35);
}

.x9 {
  .inner {
    animation: sideWays 4s ease-in-out infinite alternate;
  }
  .bubble {
    animation: animateBubble 29s linear infinite;
  }

  left: 90%;
  top: 50%;
  transform: scale(0.6);
}

.x10 {
  .inner {
    animation: sideWays 2s ease-in-out infinite alternate;
  }
  .bubble {
    animation: animateBubble 26s linear infinite;
  }
  left: 80%;
  top: 80%;
  transform: scale(0.3);
}

.jellyfish {
  z-index: 0;
  height: 500px;
  transform-origin: center;
  animation: squoosh 3s ease-in-out infinite;
  animation-direction: alternate;
  filter: drop-shadow(0px 0px 10px rgba(0, 0, 0, 0.2));
}

.tentacle {
  animation-direction: alternate;
  animation: squigglevision 0.5s infinite alternate;
}

@keyframes squoosh {
  0% {
    transform: scaleX(1) scaleY(0.95) translateY(5%);
  }
  100% {
    transform: scaleX(0.9) scaleY(1.05) translateY(-2.5%);
  }
}

@keyframes squigglevision {
  0% {
    filter: url("#turbulence-1");
  }
  25% {
    filter: url("#turbulence-2");
  }
  50% {
    filter: url("#turbulence-3");
  }
  75% {
    filter: url("#turbulence-4");
  }
  100% {
    filter: url("#turbulence-5");
  }
}
!

JS
!
999px

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