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HTML 

              
                html
  head
    title Neon Clock (Using React Hooks)
    meta(name='viewport', content='initial-scale=2.0')
    
  body
    #root
!

CSS 

              
                @dark-bg: #090710;
@muted-red: #792d2d;
@glowing-red: #ffc5b2;
@shadow-red: #ff4343;
@silver: #a8b0f3;

.center-children () {
  display: flex;
  align-items: center;
  justify-content: center;
}

body {
  max-width: 100vw;
  font-family: "Julius Sans One";
  background: @dark-bg;
}

#root {
  width: 100%;
  min-height: 100vh;
  .center-children();
}

.clock {
  width: 100%;
  max-width: 75vw;
  padding: 20px 0;
  flex-direction: column;
  .center-children();
}

.phrases {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  word-spacing: 12px;
  font-size: 36px;
  line-height: 1.618;
}

.timer {
  margin-top: 30px;
  margin-left: 10px;
  color: @silver;
  font-size: 20px;
  font-weight: bold;
}

span {
  color: @muted-red;
  margin: 0 10px;
  transition: all 0.5s cubic-bezier(0.6, -0.51, 0.5, 1.51);
  vertical-align: middle;
  filter: blur(2px);

  &.glow {
    color: @glowing-red;
    text-shadow: 0 0 20px @shadow-red;
    font-weight: bold;
    filter: none;
  }
}

.standard-clock {
  max-width: 300px;
  min-width: 300px;
  height: 300px;
  margin-bottom: 40px;
  border-radius: 50%;
  border: 5px double;
  color: @glowing-red;
  position: relative;
  text-shadow: 0 0 20px @shadow-red;
  box-shadow: 0 0 20px @shadow-red, inset 0 0 20px @shadow-red;
  transition: all 0.5s cubic-bezier(0.6, -0.51, 0.5, 1.51);
  
  &:before {
    content: ' ';
    position: absolute;
    top: -14px;
    left: -14px;
    display: block;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    border: 4px dotted red;
    transition: all 0.5s cubic-bezier(0.6, -0.51, 0.5, 1.51);
  }
}

.inner-circle {
  position: absolute;
  top: 50px;
  left: 50px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 2px solid;
  box-shadow: 0 0 20px @shadow-red, inset 0 0 20px @shadow-red;
  transition: all 0.5s cubic-bezier(0.6, -0.51, 0.5, 1.51);
}

.inner-circle-2 {
  position: absolute;
  top: 60px;
  left: 60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  border: 2px solid;
  box-shadow: 0 0 20px @shadow-red, inset 0 0 20px @shadow-red;
  transition: all 0.5s cubic-bezier(0.6, -0.51, 0.5, 1.51);
}

.mark {
  position: absolute;
  display: inline-block;
  top: 10px;
  left: 115px;
  width: 50px;
  height: 30px;
  font-size: 30px;
  text-align: center;
  color: @glowing-red;
  filter: none;
  transform-origin: 25px 140px;
}

.generate-mark-rotation (@n) when (@n = 13) {}
.generate-mark-rotation (@n) when (@n < 13) {
  span.mark:nth-child(@{n}) {
    transform: rotate((@n - 1) * 30deg);
  }
  .generate-mark-rotation(@n + 1);
}
.generate-mark-rotation(2);

.tick {
  position: absolute;
  display: inline-block;
  top: 51px;
  left: 141px;
  width: 0px;
  outline: 1px @glowing-red solid;
  height: 8px;
  //background: @glowing-red;
  transform-origin: 0px 100px;
  filter: none;
}

.generate-tick-rotation (@n) when (@n = 61) {}
.generate-tick-rotation (@n) when (@n < 61) {
  span.tick:nth-child(@{n}) {
    //background: green;
    transform: rotate((@n - 1) * 6deg);
  }
  .generate-tick-rotation(@n + 1);
}
.generate-tick-rotation(2);

.generate-big-tick-rotation (@n) when (@n = 12) {}
.generate-big-tick-rotation (@n) when (@n < 12) {
  @m: (@n * 5) + 1;
  span.tick:nth-child(@{m}) {
    height: 20px;
  }
  .generate-big-tick-rotation(@n + 1);
}
.generate-big-tick-rotation(0);

.hour-hand,
.minute-hand,
.second-hand {
  width: 10px;
  height: 55px;
  background: @glowing-red;
  position: absolute;
  top: 100px;
  left: 145px;
  border-radius: 0 0 5px 5px;
  transform-origin: 5px 50px;
  box-shadow: 0 0 20px @shadow-red;
}

.hour-hand::before {
  content: " ";
  display: block;
  position: absolute;
  top: -15px;
  left: 0;
  width: 0;
  height: 0;
  border: 5px #0000 solid;
  border-bottom: 10px @glowing-red solid;
}

.minute-hand {
  width: 4px;
  height: 75px;
  top: 75px;
  left: 148px;
  border-radius: 2px;
  transform-origin: 2px 75px;
}

.second-hand {
  width: 2px;
  height: 90px;
  top: 60px;
  left: 149px;
  border-radius: 1px;
  transform-origin: 1px 90px;
}

.center {
  position: absolute;
  top: 135px;
  left: 135px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: @glowing-red;
  box-shadow: 0 0 20px @shadow-red;
  transition: all 0.5s cubic-bezier(0.6, -0.51, 0.5, 1.51);
}

@media only screen and (max-width: 960px) {
  .clock {
    max-width: 90vw;
  }

  .phrases {
    font-size: 18px;
    word-spacing: 7px;
  }

  span {
    margin-right: 10px;
    filter: blur(1px);
  }

  .timer {
    font-size: 12px;
  }

  .standard-clock {
    max-width: 200px;
    min-width: 200px;
    height: 200px;
    margin-bottom: 20px;
    text-shadow: 0 0 10px @shadow-red;
    box-shadow: 0 0 10px @shadow-red, inset 0 0 10px @shadow-red;
    
    &:before {
      width: 220px;
      height: 220px;
    }
  }

  .inner-circle {
    top: 35px;
    left: 35px;
    width: 130px;
    height: 130px;
    box-shadow: 0 0 10px @shadow-red, inset 0 0 10px @shadow-red;
  }
  
  .inner-circle-2 {
    top: 45px;
    left: 45px;
    width: 110px;
    height: 110px;
  }
  
  .mark {
    top: 8px;
    left: 76px;
    width: 30px;
    height: 20px;
    font-size: 20px;
    transform-origin: 15px 92px;
  }

  .tick {
    top: 36px;
    left: 91px;
    transform-origin: 0px 65px;
  }
  
  .hour-hand,
  .minute-hand,
  .second-hand {
    height: 40px;
    top: 65px;
    left: 95px;
    transform-origin: 5px 35px;
    box-shadow: 0 0 10px @shadow-red;
  }

  .minute-hand {
    height: 55px;
    top: 50px;
    left: 98px;
    transform-origin: 2px 50px;
  }

  .second-hand {
    height: 55px;
    top: 45px;
    left: 100px;
    transform-origin: 1px 55px;
  }

  .center {
    top: 90px;
    left: 90px;
    width: 20px;
    height: 20px;
    box-shadow: 0 0 10px @shadow-red;
  }
}
!

JS 

              
                const phrases = [
  'IT IS',
  'ABOUT',
  'NEARLY',
  'TEN',
  'QUARTER',
  'TWENTY',
  'FIVE',
  'HALF',
  'PAST',
  'TO',
  'ONE',
  'TWO',
  'THREE',
  'FOUR',
  'FIVE',
  'SIX',
  'SEVEN',
  'EIGHT',
  'NINE',
  'TEN',
  'ELEVEN',
  'NOON',
  'MIDNIGHT',
  'O\' CLOCK',
  'IN THE',
  'MORNING',
  'AFTERNOON',
  'EVENING',
];

function getNow () {
  const now = new Date(Date.now());
  const hour = now.getHours();
  const minute = now.getMinutes();
  const second = now.getSeconds();
  const display = now.toLocaleString();

  return {
    hour,
    minute,
    second,
    display,
  };
}

function getReadoutConfig ({ hour, minute }) {
  const lastMinuteMark = Math.floor(minute / 5) * 5;
  const distFromLast = minute - lastMinuteMark;
  const isExact = distFromLast === 0;
  const isNearly = !isExact && distFromLast > 2;
  const isAbout = !isExact && !isNearly;
  const nearestMinuteMark = isNearly
    ? (lastMinuteMark + 5) % 60
    : lastMinuteMark;
  const isOClock = nearestMinuteMark === 0;
  const isPast = !isOClock && nearestMinuteMark <= 30;
  const isTo = !isOClock && !isPast;
  const minuteMark = (isPast || isOClock)
    ? nearestMinuteMark
    : 60 - nearestMinuteMark;

  const nearestHour = (isTo || (isOClock && isNearly)) ? (hour + 1) % 24 : hour;
  const nearestHour12 = nearestHour > 12
    ? nearestHour - 12
    : nearestHour;
  const isNoon = nearestHour === 12;
  const isMidnight = nearestHour === 0;
  const isMorning = !isMidnight && nearestHour < 12;
  const isAfternoon = nearestHour > 12 && nearestHour <= 18;
  const isEvening = nearestHour > 18;

  return {
    isExact,
    isAbout,
    isNearly,

    minute: minuteMark,
    isOClock: isOClock && !isNoon && !isMidnight,
    isPast,
    isTo,

    hour: nearestHour12,
    isNoon,
    isMidnight,
    isMorning,
    isAfternoon,
    isEvening,
  };
}

function getHighlights (config) {
  return [
    true, // IT IS
    config.isAbout, // ABOUT
    config.isNearly, // NEARLY
    config.minute === 10, // TEN
    config.minute === 15, // QUARTER
    config.minute === 20 || config.minute === 25, // TWENTY
    config.minute === 5 || config.minute === 25, // FIVE
    config.minute === 30, // HALF
    config.isPast, // PAST
    config.isTo, // TO
    config.hour === 1, // ONE
    config.hour === 2, // TWO
    config.hour === 3, // THREE
    config.hour === 4, // FOUR
    config.hour === 5, // FIVE
    config.hour === 6, // SIX
    config.hour === 7, // SEVEN
    config.hour === 8, // EIGHT
    config.hour === 9, // NINE
    config.hour === 10, // TEN
    config.hour === 11, // ELEVEN
    config.isNoon, // NOON
    config.isMidnight, // MIDNIGHT
    config.isOClock, // O' CLOCK
    config.isMorning || config.isAfternoon || config.isEvening, // IN THE
    config.isMorning, // MORNING
    config.isAfternoon, // AFTERNOON
    config.isEvening, // EVENING
  ];
}

function speak (text) {
  const synth = window.speechSynthesis;
  const rate = 0.7;
  const pitch = 0.6;
  const voice = synth.getVoices().filter(v => v.lang === 'en-GB')[0];
  const utterance = new SpeechSynthesisUtterance(text);
  utterance.voice = voice;
  utterance.pitch = pitch;
  utterance.rate = rate;
  synth.speak(utterance);
}

function useClock () {
  const [timer, setTimer] = React.useState(null);
  const [time, setTime] = React.useState(getNow());

  React.useEffect(() => {
    if (!timer) initTimer();
    return (() => (timer && window.clearInterval(timer) && setTimer(null)));
  }, [timer]);

  function initTimer () {
    const now = Date.now();
    const nextSec = (Math.floor(now / 1000) + 1) * 1000;
    const timeLeft = nextSec - now;

    window.setTimeout(() => {
      const interval = window.setInterval(() => setTime(getNow()), 1000);
      setTimer(interval);
    }, timeLeft);
  }

  return time;
}

function StandardClock ({ time }) {
  const clockMarks = [ 'XII', 'I', 'II', 'III', 'IV', 'V', 'VI', 'VII', 'VIII', 'IX', 'X', 'XI' ];
  const hourAngle = ((time.hour % 12) * 60 + time.minute) / 2;
  const minuteAngle = (time.minute * 60 + time.second) / 10;
  const secondAngle = time.second * 6;

  return (
    <div className='standard-clock'>
      <div>
        { clockMarks.map(mark => <span className='mark'>{mark}</span>) }
      </div>
      <div>
        { Array(60).fill(1).map(tick => <span className='tick' />) }
      </div>
      <div className='inner-circle' />
      <div className='inner-circle-2' />
      <div className='hour-hand' style={{ transform: `rotate(${hourAngle}deg)` }} />
      <div className='minute-hand' style={{ transform: `rotate(${minuteAngle}deg)` }} />
      <div className='second-hand' style={{ transform: `rotate(${secondAngle}deg)` }} />
      <div className='center' />
    </div>
  );
}

function Speaker ({ active, text }) {
  if (!window.speechSynthesis) return null;
  React.useEffect (() => {
    if (active) speak(text);
  });
  return null;
}

function TimeReadout ({ time }) {
  const readoutConfig = getReadoutConfig(time);
  const highlighted = getHighlights(readoutConfig);
  const timeText = phrases.filter((phrase, index) => highlighted[index]).join(' ') + '.';
  const shouldSpeak = time.second === 0 && time.minute % 15 === 0;
  
  return (
    <div className='readout'>
      <p className='phrases'>
        { phrases.map((phrase, index) => (
          <span className={highlighted[index] ? 'glow' : ''}>
            {phrase}
          </span>
        ))}
      </p>
      <p className='timer'>{time.display}</p>
      <Speaker active={shouldSpeak} text={timeText} />
    </div>
  );
}

function NeonClock () {
  const time = useClock();
  return (
    <div className='clock'>
      <StandardClock time={time} />
      <TimeReadout time={time} />
    </div>
  );
}

const root = document.getElementById('root');
ReactDOM.render(<NeonClock />, root);
!
999px

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