<div class="container">
  <p class="glitch">
    <span aria-hidden="true">codepen</span>
    codepen
    <span aria-hidden="true">codepen</span>
  </p>
</div>

body {
  background: black;
  color: white;
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  text-align: center;
}

.glitch {
  font-size: 5rem;
  font-weight: bold;
  text-transform: uppercase;
  position: relative;
  text-shadow: 0.05em 0 0 #00fffc, -0.03em -0.04em 0 #fc00ff,
    0.025em 0.04em 0 #fffc00;
  animation: glitch 725ms infinite;
}

.glitch span {
  position: absolute;
  top: 0;
  left: 0;
}

.glitch span:first-child {
  animation: glitch 500ms infinite;
  clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
  transform: translate(-0.04em, -0.03em);
  opacity: 0.75;
}

.glitch span:last-child {
  animation: glitch 375ms infinite;
  clip-path: polygon(0 65%, 100% 65%, 100% 100%, 0 100%);
  transform: translate(0.04em, 0.03em);
  opacity: 0.75;
}

@keyframes glitch {
  0% {
    text-shadow: 0.05em 0 0 #00fffc, -0.03em -0.04em 0 #fc00ff,
      0.025em 0.04em 0 #fffc00;
  }
  15% {
    text-shadow: 0.05em 0 0 #00fffc, -0.03em -0.04em 0 #fc00ff,
      0.025em 0.04em 0 #fffc00;
  }
  16% {
    text-shadow: -0.05em -0.025em 0 #00fffc, 0.025em 0.035em 0 #fc00ff,
      -0.05em -0.05em 0 #fffc00;
  }
  49% {
    text-shadow: -0.05em -0.025em 0 #00fffc, 0.025em 0.035em 0 #fc00ff,
      -0.05em -0.05em 0 #fffc00;
  }
  50% {
    text-shadow: 0.05em 0.035em 0 #00fffc, 0.03em 0 0 #fc00ff,
      0 -0.04em 0 #fffc00;
  }
  99% {
    text-shadow: 0.05em 0.035em 0 #00fffc, 0.03em 0 0 #fc00ff,
      0 -0.04em 0 #fffc00;
  }
  100% {
    text-shadow: -0.05em 0 0 #00fffc, -0.025em -0.04em 0 #fc00ff,
      -0.04em -0.025em 0 #fffc00;
  }
}