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About the <head>

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CSS

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link rel="stylesheet" href="style.css" />
  <script src="./main.js" defer></script>
  <title>CLIP PATH</title>
</head>
<body>
  <div class="example">
    <div class="item pictureAnimation">
      <div class="pictures">
        <div class="picture">
          <img alt="Palace" src="https://picsum.photos/1000/1000?random=1" />
        </div>
        <div class="picture">
          <img alt="Philosopher" src="https://picsum.photos/1000/1000?random=2" />
        </div>
        <div class="picture">
          <img alt="Night" src="https://picsum.photos/1000/1000?random=3" />
        </div>
      </div>
      <div class="dots"></div>
      <div class="buttons">
        <button type="button"></button>
        <button type="button"></button>
      </div>
    </div>
    <div class="item clockAnimation">
      <div class="clock">
        <div class="buttonGreen"></div>
        <div class="buttonOrange"></div>
        <div class="circle">
          <div class="hand"></div>
          <div class="center"></div>
        </div>
      </div>
    </div>
  </div>
</body>
</html>
!

CSS 

              
                .example {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  padding: 50px 0;
}

.item + .item{
  margin-top: 50px;
}

.pictureAnimation {
  position: relative;
  overflow: hidden;
  width: 300px;
  height: 300px;
  background-color: #1a1a1a;
  border-radius: 20px;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);
}

.picture {
  position: absolute;
  inset: 0;
  clip-path: inset(110% 35% -100% round 110px);
  width: 100%;
  height: 100%;
  animation: 1.5s forwards ease-in-out;
}

.picture.start {
  clip-path: inset(15% 15% -60% round 260px);
}

.picture.slideOutUp {
  animation-name: slideOutUp;
}

.picture.slideInUp {
  animation-name: slideInUp;
  animation-delay: 0.9s;
}

.picture.slideOutDown {
  animation-name: slideOutDown;
}

.picture.slideInDown {
  animation-name: slideInDown;
  animation-delay: 0.9s;
}

.picture img {
  width: 100%;
  object-fit: cover;
}

.dots {
  position: absolute;
  right: 20px;
  top: 20px;
  width: 20px;
}

.dots .dot {
  width: 20px;
  height: 20px;
  background-color: #787878;
  border-radius: 5px;
  transition: 1s background-color 0.3s;
}

.dots .dot + .dot {
  margin-top: 10px;
}

.dots .dot.selected {
  background-color: #fff;
}

.buttons {
  position: absolute;
  right: 20px;
  bottom: 20px;
  width: 20px;
}

.buttons button {
  width: 20px;
  height: 20px;
  padding: 0;
  background-color: #fff;
  border: none;
  border-radius: 5px;
  vertical-align: top;
  cursor: pointer;
}

.buttons button:active {
  opacity: 0.8;
}

.buttons button + button {
  margin-top: 10px;
}

.buttons button::after {
  display: inline-block;
  width: 5px;
  height: 5px;
  border: solid #000;
  border-width: 2px 0 0 2px;
  rotate: 45deg;
  cursor: pointer;
  content: '';
}

.buttons button:last-child::after {
  rotate: 225deg;
  translate: 0 -2px;
}

@keyframes slideInUp {
  0% {
    clip-path: inset(110% 35% -100% round 120px);
  }
  40% {
    clip-path: inset(5% 35% 15% round 120px);
  }
  55% {
    clip-path: inset(12% 35% 8% round 120px);
  }
  70% {
    clip-path: inset(10% 35% round 120px);
  }
  100% {
    clip-path: inset(15% 15% -60% round 260px);
  }
}

@keyframes slideOutUp {
  0% {
    clip-path: inset(15% 15% -60% round 260px);
  }
  40% {
    clip-path: inset(10% 35% round 120px);
  }
  60% {
    clip-path: inset(12% 35% 8% round 120px);
  }
  100% {
    clip-path: inset(-100% 35% 110% round 120px);
  }
}

@keyframes slideInDown {
  0% {
    clip-path: inset(-100% 35% 120% round 120px);
  }
  40% {
    clip-path: inset(15% 35% 5% round 120px);
  }
  55% {
    clip-path: inset(8% 35% 12% round 120px);
  }
  70% {
    clip-path: inset(10% 35% round 120px);
  }
  100% {
    clip-path: inset(15% 15% -60% round 260px);
  }
}

@keyframes slideOutDown {
  0% {
    clip-path: inset(15% 15% -60% round 260px);
  }
  40% {
    clip-path: inset(10% 35% round 120px);
  }
  60% {
    clip-path: inset(8% 35% 12% round 120px);
  }
  100% {
    clip-path: inset(120% 35% -100% round 120px);
  }
}

.clockAnimation {
  width: 300px;
}

.clock {
  position: relative;
  width: 250px;
  height: 250px;
  padding: 25px;
  background-color: #e0d0c5;
  border-radius: 20px;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);
}

.buttonGreen {
  position: absolute;
  left: 40px;
  top: -10px;
  width: 120px;
  height: 10px;
  border-radius: 10px 10px 0 0;
  background-color: #418c71;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);
}

.buttonOrange {
  position: absolute;
  right: 40px;
  top: -10px;
  width: 80px;
  height: 10px;
  border-radius: 10px 10px 0 0;
  background-color: #f89334;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);
}

.clock .circle {
  position: relative;
  overflow: hidden;
  width: 246px;
  height: 246px;
  background-color: #fff;
  border: 2px solid rgb(228, 208, 195);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);
}

.clock .hand {
  position: absolute;
  inset: -27px;
  background-color: #418c71;
  clip-path: path("M150,0 A150,150 0,1,1 163,1 L150,150 Z");
  animation: handRotate 3s linear 1s forwards;
}

.clock .center {
  position: absolute;
  top: 100px;
  left: 100px;
  width: 40px;
  height: 40px;
  border: 3px solid #f7c17f;
  border-radius: 50%;
  background-color: #d2a46c;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);
  rotate: 3deg;
  animation: centerRotate 3s linear 1s forwards;
}

.clock .center::after {
  position: absolute;
  top: -3px;
  left: 19px;
  width: 3px;
  height: 9px;
  border-radius: 4px;
  background-color: #5c4b2e;
  content: '';
}

@keyframes handRotate {
  20% {
    clip-path: path("M150,0 A150,150 0,1,1 287,90 L150,150 Z");
  }
  40% {
    clip-path: path("M150,0 A150,150 0,1,1 275,232 L150,150 Z");
  }
  60% {
    clip-path: path("M150,0 A150,150 0,1,1 136,300 L150,150 Z");
  }
  80% {
    clip-path: path("M150,0 A150,150 0,1,1 10,204 L150,150 Z");
  }
  100% {
    clip-path: path("M150,0 A150,150 0,1,1 25,67 L150,150 Z");
  }
}

@keyframes centerRotate {
  100% {
    rotate: 301deg;
  }
}
!

JS 

              
                const animateClock = () => {
  let point = [125, 2];
  const radius = 150;
  const circle = document.querySelector('.circle');
  const hand = document.querySelector('.hand');

  const getClipPath = () => {
    return `path("M150,0 A150,150 0,1,1 ${point.join(',')} L150,150 Z")`
  }

  const getDistance = (value) => {
    return value < radius ? value : radius * 2 - value;
  }

  const findCircleCoordinate = (fixedValue, isLargeValue) =>{
    const center = 150;
    const delta = fixedValue - center;
    const deltaCoordinate = Math.sqrt(radius ** 2 - delta ** 2);

    return isLargeValue ? center + deltaCoordinate : center - deltaCoordinate;
  }

  circle.addEventListener('click', ({offsetX, offsetY}) => {
    point = getDistance(offsetX) >= getDistance(offsetY)
      ? [offsetX, findCircleCoordinate(offsetX, offsetY >= 150)]
      : [findCircleCoordinate(offsetY, offsetX >= 150), offsetY];
  });
}

const animatePicture = () => {
  let order = 0;
  const pictures = document.querySelector('.pictures');
  const dots = document.querySelector('.dots');
  const prevButton = document.querySelector('.buttons button:first-child');
  const nextButton = document.querySelector('.buttons button:last-child');

  for (let i = 0; i < pictures.children.length; i++) {
    const dot = document.createElement('div');
    dot.className = 'dot';
    i === order && dot.classList.add('selected');
    dots.appendChild(dot);
  }

  pictures.children[order].className = 'picture start selected';

  const changePicture = (direction) => {
    const selectedPicture = pictures.querySelector('.selected');
    const selectedDot = dots.querySelector('.selected');
    const animationDirection = direction === 'next' ? 'Up' : 'Down';

    if (direction === 'prev') {
      order = !order ? pictures.children.length - 1 : order - 1;
    } else if (direction === 'next') {
      order = order === pictures.children.length - 1 ? 0 : order + 1;
    }

    selectedPicture.className = `picture slideOut${animationDirection}`;
    pictures.children[order].className = `picture selected slideIn${animationDirection}`;

    selectedDot.className = `dot`;
    dots.children[order].className = `dot selected`;

    nextButton.disabled = true;
    prevButton.disabled = true;

    setTimeout(() => {
      selectedPicture.classList.remove(`slideOut${animationDirection}`);
      nextButton.disabled = false;
      prevButton.disabled = false;
    }, 2400);
  };

  prevButton.addEventListener('click', () => {
    changePicture('prev');
  });

  nextButton.addEventListener('click', () => {
    changePicture('next');
  });
}

animateClock();
animatePicture();
!
999px

Console