style.css

html {
  background: #018ded url(https://picsum.photos/200/300/?blur);
  background-size: cover;
  font-family: Helvetica, sans-serif;
  text-align: center;
  font-size: 10px;
}

body {
  font-size: 2rem;
  display: flex;
  flex: 1;
  min-height: 100vh;
  align-items: center;
}
.clock {
  width: 30rem;
  height: 30rem;
  border: 20px solid white;
  border-radius: 50%;
  margin: 50px auto;
  position: relative;
  padding: 2rem;
  box-shadow: 0 0 0px 4px regba(0, 0, 0, 0.1), inset 0 0 0 3px #efefef,
    inset 0 0 10px black, 0 0 10px regba(0, 0, 0, 0.2);
}
.clock-face {
  position: relative;
  width: 100%;
  height: 100%;
  transform: translateY(-3px);
}
.hand {
  width: 50%;
  height: 6px;
  background: black;
  position: absolute;
  top: 50%;
  transform-origin: 100%;
  transform: rotate(90deg);
  transition: all 0.5s;
  transition-timing-function: cubic-bezier(0.1, 2.67, 0.58, 1);
}