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HTML

              
                #app
              
            
!

CSS

              
                *
  box-sizing border-box
  background #947cb0

body
  align-items center
  display flex
  justify-content center
  font-family 'Arial', sans-serif
  min-height 100vh
  padding 0
  margin 0
  overflow hidden

.mask
  position fixed
  top 50%
  left 0
  right 0
  bottom 0
  background #947cb0

.bear
  width 100%
  background transparent
  transform translate(0, 100%)
  &__swear
    display none
    position absolute
    left 105%
    top 0
    background #fff
    font-weight bolder
    padding 10px
    border-radius 8px
    &:before
      content ''
      background #fff
      position absolute
      top 90%
      right 70%
      height 30px
      width 30px
      clip-path polygon(0 100%, 100% 0, 50% 0)
      -webkit-clip-path polygon(0 100%, 100% 0, 50% 0)
  &__wrap
    width 100px
    left 50%
    position absolute
    top 50%
    transform translate(-15%, -50%) rotate(5deg) translate(0, -75%)
    background transparent

  &__arm-wrap
    background transparent
    position fixed
    height 30px
    width 90px
    z-index 4
    top 50%
    left 50%
    transform translate(0, -50%) rotate(0deg)

  &__arm
    background transparent
    transform-origin left
    position absolute
    height 100%
    width 100%
    top 50%
    left 50%
    transform translate(-35%, -50%) scaleX(1)

  &__paw
    background #784421
    border-radius 100%
    position fixed
    height 30px
    width 30px
    z-index 10
    top 50%
    left 50%
    transform-origin right
    transform translate(80px, -15px) scaleX(0)


.checkbox
  border-radius 50px
  height 100px
  position fixed
  width 200px
  z-index 5
  top 50%
  left 50%
  transform translate(-50%, -50%)

  [type='checkbox']
    cursor pointer
    border-radius 50px
    position absolute
    outline 0
    top 0
    right 0
    bottom 0
    left 0
    opacity 0
    z-index 10
    height 100%
    width 100%
    margin 0

  &__bg
    background #aaa
    border-radius 50px
    height 100%
    width 100%
    z-index 10

  &__indicator
    background transparent
    height 100%
    width 50%
    border-radius 100%
    position absolute
    top 0
    left 0

    &:after
      content ''
      border-radius 100%
      height 85%
      width 85%
      background #fff
      position absolute
      top 50%
      left 50%
      transform translate(-50%, -50%)
              
            
!

JS

              
                const {
  React: { useState, useRef, useEffect, Fragment },
  ReactDOM: { render },
  gsap: {
    set,
    to,
    timeline,
    utils: { random },
  },
} = window
const rootNode = document.getElementById('app')
const armLimit = random(0, 3)
const headLimit = random(armLimit + 1, armLimit + 3)
const angerLimit = random(headLimit + 1, headLimit + 3)
const armDuration = 0.2
const bearDuration = 0.25
const checkboxDuration = 0.25
const pawDuration = 0.1

const SOUNDS = {
  ON: new Audio('https://assets.codepen.io/605876/switch-on.mp3'),
  OFF: new Audio('https://assets.codepen.io/605876/switch-off.mp3'),
  GROAN: new Audio('https://assets.codepen.io/605876/bear-groan.mp3'),
}
SOUNDS.GROAN.playbackRate = 2

const App = () => {
  const [checked, setChecked] = useState(false)
  const [count, setCount] = useState(1)
  const bearRef = useRef(null)
  const swearRef = useRef(null)
  const armWrapRef = useRef(null)
  const pawRef = useRef(null)
  const armRef = useRef(null)
  const bgRef = useRef(null)
  const indicatorRef = useRef(null)

  const onHover = () => {
    if (Math.random() > 0.5 && count > armLimit) {
      to(bearRef.current, bearDuration / 2, { y: '40%' })
    }
  }
  const offHover = () => {
    if (!checked) {
      to(bearRef.current, bearDuration / 2, { y: '100%' })
    }
  }
  const onChange = () => {
    if (checked) return
    setChecked(true)
  }

  useEffect(() => {
    const grabBearTL = () => {
      /**
       * Different height translations for the bear elements
       *
       * Paw will go to scaleX 0.8
       * Arm scaleX goes down to 0.7
       * Arm wrap translates to 50% or 50px
       * Bear goes 100% -> 40% -> 0
       */
      let bearTranslation
      if (count > armLimit && count < headLimit) {
        bearTranslation = '40%'
      } else if (count >= headLimit) {
        bearTranslation = '0%'
      }
      const onComplete = () => {
        setChecked(false)
        setCount(count + 1)
      }
      let onBearComplete = () => {}
      if (Math.random() > 0.5 && count > angerLimit)
        onBearComplete = () => {
          SOUNDS.GROAN.play()
          set(swearRef.current, { display: 'block' })
        }
      const base = armDuration + armDuration + pawDuration
      const preDelay = Math.random()
      const delay = count > armLimit ? base + bearDuration + preDelay : base
      const bearTL = timeline({ delay: Math.random(), onComplete })
      bearTL
        .add(
          count > armLimit
            ? to(bearRef.current, {
                duration: bearDuration,
                onComplete: onBearComplete,
                y: bearTranslation,
              })
            : () => {}
        )
        .to(
          armWrapRef.current,
          { x: 50, duration: armDuration },
          count > armLimit ? preDelay : 0
        )
        .to(armRef.current, { scaleX: 0.7, duration: armDuration })
        .to(pawRef.current, {
          duration: pawDuration,
          scaleX: 0.8,
          onComplete: () => set(swearRef.current, { display: 'none' }),
        })
        .to(
          bgRef.current,
          {
            onStart: () => {
              SOUNDS.OFF.play()
            },
            duration: checkboxDuration,
            backgroundColor: '#aaa',
          },
          delay
        )
        .to(
          indicatorRef.current,
          { duration: checkboxDuration, x: '0%' },
          delay
        )
        .to(pawRef.current, { duration: pawDuration, scaleX: 0 }, delay)
        .to(
          armRef.current,
          { duration: pawDuration, scaleX: 1 },
          delay + pawDuration
        )
        .to(
          armWrapRef.current,
          { duration: armDuration, x: 0 },
          delay + pawDuration
        )
        .to(
          bearRef.current,
          { duration: bearDuration, y: '100%' },
          delay + pawDuration
        )
      return bearTL
    }
    const showTimeline = () => {
      timeline({
        onStart: () => SOUNDS.ON.play(),
      })
        .to(
          bgRef.current,
          { duration: checkboxDuration, backgroundColor: '#2eec71' },
          0
        )
        .to(indicatorRef.current, { duration: checkboxDuration, x: '100%' }, 0)
        .add(grabBearTL(), checkboxDuration)
    }
    if (checked) showTimeline()
  }, [checked, count])

  return (
    <Fragment>
      <div className="bear__wrap">
        <div ref={swearRef} className="bear__swear">
          #@$%*!
        </div>
        <svg
          ref={bearRef}
          className="bear"
          viewBox="0 0 284.94574 359.73706"
          preserveAspectRatio="xMinYMin">
          <g id="layer1" transform="translate(-7.5271369,-761.38595)">
            <g
              id="g5691"
              transform="matrix(1.2335313,0,0,1.2335313,-35.029693,-212.83637)">
              <path
                id="path4372"
                d="M 263.90933,1081.4151 A 113.96792,96.862576 0 0 0 149.99132,985.71456 113.96792,96.862576 0 0 0 36.090664,1081.4151 l 227.818666,0 z"
                style={{ fill: '#784421', fillOpacity: 1 }}
              />
              <path
                id="path5634"
                d="m 250.42825,903.36218 c 2e-5,66.27108 -44.75411,114.99442 -102.42825,114.99442 -57.674143,0 -98.428271,-48.72334 -98.428251,-114.99442 4e-6,-66.27106 40.754125,-92.99437 98.428251,-92.99437 57.67413,0 102.42825,26.72331 102.42825,92.99437 z"
                style={{ fill: '#784421', fillOpacity: 1 }}
              />
              <path
                id="path5639"
                d="m 217,972.86218 c 2e-5,21.53911 -30.44462,42.00002 -68,42.00002 -37.55538,0 -66.000019,-20.46091 -66,-42.00002 0,-21.53911 28.44464,-36 66,-36 37.55536,0 68,14.46089 68,36 z"
                style={{ fill: '#e9c6af', illOpacity: 1 }}
              />
              <path
                id="path5636"
                d="m 181.5,944.36218 c 0,8.28427 -20.59974,26.5 -32.75,26.5 -12.15026,0 -34.75,-18.21573 -34.75,-26.5 0,-8.28427 22.59974,-13.5 34.75,-13.5 12.15026,0 32.75,5.21573 32.75,13.5 z"
                style={{ fill: '#000000', fillOpacity: 1 }}
              />
              <g id="g5681">
                <ellipse
                  style={{ fill: '#784421', fillOpacity: 1 }}
                  id="path5657"
                  cx="69"
                  cy="823.07269"
                  rx="34.5"
                  ry="33.289474"
                />
                <path
                  style={{ fill: '#e9c6af', fillOpacity: 1 }}
                  d="M 69,47.310547 A 24.25,23.399124 0 0 0 44.75,70.710938 24.25,23.399124 0 0 0 64.720703,93.720703 c 0.276316,-0.40734 0.503874,-0.867778 0.787109,-1.267578 1.70087,-2.400855 3.527087,-4.666237 5.470704,-6.798828 1.943616,-2.132591 4.004963,-4.133318 6.179687,-6.003906 2.174725,-1.870589 4.461274,-3.611714 6.855469,-5.226563 2.394195,-1.614848 4.896019,-3.10338 7.498047,-4.46875 0.539935,-0.283322 1.133058,-0.500695 1.68164,-0.773437 A 24.25,23.399124 0 0 0 69,47.310547 Z"
                  id="ellipse5659"
                  transform="translate(0,752.36216)"
                />
              </g>
              <g transform="matrix(-1,0,0,1,300,0)" id="g5685">
                <ellipse
                  ry="33.289474"
                  rx="34.5"
                  cy="823.07269"
                  cx="69"
                  id="ellipse5687"
                  style={{ fill: '#784421', illOpacity: 1 }}
                />
                <path
                  transform="translate(0,752.36216)"
                  id="path5689"
                  d="M 69,47.310547 A 24.25,23.399124 0 0 0 44.75,70.710938 24.25,23.399124 0 0 0 64.720703,93.720703 c 0.276316,-0.40734 0.503874,-0.867778 0.787109,-1.267578 1.70087,-2.400855 3.527087,-4.666237 5.470704,-6.798828 1.943616,-2.132591 4.004963,-4.133318 6.179687,-6.003906 2.174725,-1.870589 4.461274,-3.611714 6.855469,-5.226563 2.394195,-1.614848 4.896019,-3.10338 7.498047,-4.46875 0.539935,-0.283322 1.133058,-0.500695 1.68164,-0.773437 A 24.25,23.399124 0 0 0 69,47.310547 Z"
                  style={{ fill: '#e9c6af', fillOpacity: 1 }}
                />
              </g>
              <ellipse
                ry="9.6790915"
                rx="9.2701159"
                cy="900.38916"
                cx="105.83063"
                id="path4368"
                style={{ fill: '#000000', fillOpacity: 1 }}
              />
              <ellipse
                style={{ fill: '#000000', fillOpacity: 1 }}
                id="ellipse4370"
                cx="186.89894"
                cy="900.38916"
                rx="9.2701159"
                ry="9.6790915"
              />
              {count >= angerLimit && (
                <Fragment>
                  <path
                    id="path4396"
                    d="m 92.05833,865.4614 39.42665,22.76299"
                    style={{
                      stroke: '#000000',
                      strokeWidth: 4.86408424,
                      strokeLinecap: 'round',
                      strokeLinejoin: 'round',
                      strokeMiterlimit: 4,
                      strokeOpacity: 1,
                    }}
                  />
                  <path
                    style={{
                      stroke: '#000000',
                      strokeWidth: 4.86408424,
                      strokeLinecap: 'round',
                      strokeLinejoin: 'round',
                      strokeMiterlimit: 4,
                      strokeOpacity: 1,
                    }}
                    d="m 202.82482,865.4614 -39.42664,22.76299"
                    id="path4400"
                  />
                </Fragment>
              )}
            </g>
          </g>
        </svg>
      </div>
      <div ref={armWrapRef} className="bear__arm-wrap">
        <svg
          ref={armRef}
          className="bear__arm"
          viewBox="0 0 250.00001 99.999997"
          preserveAspectRatio="xMinYMin">
          <g transform="translate(868.57141,-900.93359)" id="layer1">
            <path
              style={{ fill: '#784421', fillOpacity: 1 }}
              d="m -619.43416,945.05124 c 4.18776,73.01076 -78.25474,53.24342 -150.21568,52.94118 -82.38711,-0.34602 -98.92158,-19.44459 -98.92157,-47.05883 0,-27.61424 4.78794,-42.54902 73.82353,-42.54902 69.03559,0 171.43607,-30.93764 175.31372,36.66667 z"
              id="path4971"
            />
            <ellipse
              style={{ fill: '#e9c6af', fillOpacity: 1 }}
              id="path4974"
              cx="-683.02264"
              cy="950.98572"
              rx="29.910826"
              ry="29.414362"
            />
          </g>
        </svg>
      </div>
      <div ref={pawRef} className="bear__paw" />
      <div className="mask" />
      <div className="checkbox" onMouseOver={onHover} onMouseOut={offHover}>
        <input type="checkbox" onChange={onChange} checked={checked} />
        <div ref={bgRef} className="checkbox__bg" />
        <div ref={indicatorRef} className="checkbox__indicator" />
      </div>
    </Fragment>
  )
}

render(<App />, rootNode)

              
            
!
999px

Console