<div class="container">Hey&nbsp;
  <span class="wave">👋</span>
</div>
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}
@keyframes wave-animation {
  0% {
    transform: rotate(0deg);
  }
  10% {
    transform: rotate(14deg);
  }
  20% {
    transform: rotate(-8deg);
  }
  30% {
    transform: rotate(14deg);
  }
  40% {
    transform: rotate(-4deg);
  }
  50% {
    transform: rotate(10deg);
  }
  60% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(0deg);
  }
}

.wave {
  animation-duration: 2.5s;
  animation-iteration-count: infinite;
  animation-name: wave-animation;
  display: inline-block;
  transform-origin: 70% 70%;
}

.container {
  height: 500px;
  font-size: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}

External CSS

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External JavaScript

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