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HTML

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About the <head>

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!
Insecure Resource

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CSS

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CSS Base

About CSS Base

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <svg id="outer" width="100%" height="100%" viewBox="0 0 1400 1400" preserveAspectRatio="xMidYMid meet" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">

  <title>psychedelic clock</title>
  <defs>
    <!--logo-->
    <svg id="logo" viewBox="0 0 1432 970" preserveAspectRatio="xMidYMid meet">
      <title>xz logo</title>
      <defs>
        <mask id="xz-mask">
          <path fill="#808080" d="m 125,375 0,168 195,41 0,-141 z"/>
          <g fill="#333333">
            <path d="m 0,741 54,-15 180,16 -67,12 z"/>
            <path d="m 221,680 -99,27 198,20 112,-20 z"/>
            <path fill="#4d4d4d" d="m 360,406 -139,274 211,27 149,-217 z"/>
            <path d="m 1058,422 -602,165 223,40 551,-95 z"/>
          </g>
          <g fill="white">
            <path d="m 125,375 -71,63 0,144 -54,32 1,127 54,-15 0,142 71,3 0,-165 95,-26 139,-274 -235,137 z"/>
            <path	d="m 1058,2 -386,224 -216,361 602,-165 z"/>
          </g>
          <g fill="#808080">
            <path d="m 126,706.1 0,164.9 194.1,-2.3 0,-141.7 z"/>
            <path d="m 1058,2 0,419.9 172,110.3 0,-297.6 z"/>
          </g>
        </mask>
      </defs>
      <g id="screen" mask="url(#xz-mask)">
        <rect fill="whitesmoke"	width="100%" height="100%"/>
      </g>
    </svg>
    
    <!--browser support info-->
    <g id="not-supported">
        <text >Your browser doesn't support animated SVG.</text>
        <set attributeName="visibility" to="hidden" />
    </g>
  </defs>
  
  <!-- background color amination is now done with CSS -->
  <!--<rect width="100%" height="100%" fill="transparent">-->
    <!--<animate attributeName="fill" dur="173" values="#0cf; #0c5; #f60; #60f; #0cf" repeatCount="indefinite" />-->
  <!--</rect>-->
  
  <g id="clock" transform="translate(700 700) scale(2)" fill="white" stroke="#0cf">
    <animate attributeName="stroke" dur="173" values="#0cf; #0c5; #f60; #60f; #0cf" repeatCount="indefinite" />
    <animateTransform attributeName="transform" type="scale" dur="113s" calcMode="spline" keySplines=".2 0 .8 1; .1 0 .9 1; .3 0 .7 1; .2 0 .8 1" values="1 1; .5 1.5; 1 1; 1.5 .5; 1 1" repeatCount="indefinite" additive="sum" />
    <animateTransform attributeName="transform" type="scale" dur="151s" calcMode="spline" keySplines=".1 0 .8 1; .2 0 .9 1; .1 0 .8 1" values="1 1; 2 2; .3 .3; 1 1" repeatCount="indefinite" additive="sum" />
    <circle r="172" stroke-width="15" stroke-dasharray="5 85"/>
    <g id="clockA" fill="none">
      <path id="hH" d="M0 0 v-77" stroke-width="10" stroke-linecap="round">
        <animateTransform id="aH" attributeName="transform" type="rotate" values="0;3" dur="360s" repeatCount="indefinite" begin="aS.begin" accumulate="sum" additive="sum"/>
        <animate attributeName="stroke-width" dur="311s" calcMode="spline" keySplines=".1 0 .8 1; .2 0 .7 1; .3 0 .6 1" values="10; 23; 3; 10" repeatCount="indefinite" />
      </path>
      <path id="hM" d="M0 0 v-115" stroke-width="7" stroke-linecap="round">
        <animateTransform id="aM" attributeName="transform" type="rotate" values="0;6" dur="60s" repeatCount="indefinite" begin="aS.begin" accumulate="sum" additive="sum" />
      </path>
      <path id="hS" d="M0 0 v-135" stroke-width="4" stroke-linecap="round">
        <animateTransform id="aS" attributeName="transform" type="rotate" values="0;6" keyTimes="0;1" calcMode="discrete" dur="1s" repeatCount="indefinite" accumulate="sum" additive="sum"/>
      </path>
    </g>
    <circle r="10" stroke-width="5">
      <animate attributeName="r" type="scale" dur="73s" calcMode="spline" keySplines=".4 0 .8 1; .2 0 .7 1; .3 0 .6 1" values="10; 33; 5; 10" repeatCount="indefinite" />
      <animate attributeName="stroke-width" dur="97s" calcMode="spline" keySplines=".4 0 .8 1; .2 0 .7 1; .3 0 .6 1; .2 0 .7 1" values="5; 13; 3; 10; 5" repeatCount="indefinite" />
    </circle>
  </g>
  
  <a xlink:href="http://xzed.me" xlink:show="new">
    <use xlink:href="#logo" y="1310" x="1300" width="100" height="100"/>
    <text x="10" y="1390" >xzed.me</text>
  </a>
  
  <use xlink:href="#not-supported" y="700" x="700" text-anchor="middle" font-size="50"/>
</svg>
!

CSS 

              
                * {
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  min-height: 100%;
  overflow: hidden;
}


body {
  background-color: #0cf;
  animation: colors;
  animation-duration: 173s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
}

#outer {
  max-height: 100vh;
}

a {
  font-family: sans-serif;
  font-size: 26px;
  fill: whitesmoke;
}

@keyframes colors {
  0% {
    background-color: #0cf;
  }
  25% {
    background-color: #f60;
  }
  50% {
    background-color: greenyellow;
  }
  75% {
    background-color: #0c6;
  }
  100% {
    background-color: #0cf;
  }
}

// to set the "not supported" message initially to opacity 0
// prevents it from shortly flare up in browsers that support it
#not-supported {
  font-family: sans-serif;
  font-size: 50px;
  font-weight: bold;
  fill: orangered;
  
  opacity: 0;
  animation: fade-in;
  animation-duration: 30s;
  animation-timing-function: ease-in;
}

@keyframes fade-in {
  2% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
!

JS 

              
                // JS is only needed for setting the initial time
// animation is done natively via SVG

var secondsHand,
    secondsHandAni,
    minutesHand,
    minutesHandAni,
    hoursHand,
    hoursHandAni;

function init() {
    secondsHand = document.getElementById('hS'),
    secondsHandAni = document.getElementById('aS'),
    minutesHand = document.getElementById('hM'),
    minutesHandAni = document.getElementById('aM'),
    hoursHand = document.getElementById('hH'),
    hoursHandAni = document.getElementById('aH'),
    setTime();
}

function setAndGetSeconds() {
  var seconds = new Date().getSeconds();
  secondsHand.setAttribute('transform', 'rotate(' + (seconds * 6) + ')');
  secondsHandAni.beginElement();
  return seconds;
}

function setTime() {
  var now = new Date(),
      H = now.getHours(),
      M = now.getMinutes(),
      seconds = setAndGetSeconds(),
      h = H + round(M / 60 + seconds / 3600);
  
  minutesHand.setAttribute(
    'transform',
    'rotate(' + (M + round(seconds / 60)) * 6 + ')'
  );
  
  h = (H >= 12) ? h - 12 : h;

  hoursHand.setAttribute('transform', 'rotate(' + (h * 30) + ')');
}

function round(value) {
  var q = 100;
  return Math.round(value * q) / q;
}

window.onload = init;
!
999px

Console