body {
  background: #141414;
  font-family: "Monument", sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}
.glitch {
  color: antiquewhite;
  font-size: 100px;
  position: relative;
  margin: 0 auto;
}
.glitch::after {
  content: attr(data-text);
  position: absolute;
  left: 10px;
  text-shadow: -1px 0 red;
  top: 0;
  color: antiquewhite;
  background-color: #141414;
  overflow: hidden;
  clip: rect(0, 900px, 0, 0);
  animation: animate-glitch 3s infinite linear alternate-reverse;
}

.glitch::before {
  content: attr(data-text);
  position: absolute;
  left: -10px;
  text-shadow: 1px 0 blue;
  top: 0;
  color: antiquewhite;
  background-color: #141414;
  overflow: hidden;
  clip: rect(0, 900px, 0, 0);
  animation: animate-glitch 2s infinite linear alternate-reverse;
}

@keyframes animate-glitch {
  0% {
    clip: rect(99px, 9999px, 45px, 0);
  }
  5% {
    clip: rect(7px, 9999px, 49px, 0);
  }
  10% {
    clip: rect(52px, 9999px, 79px, 0);
  }
  15% {
    clip: rect(51px, 9999px, 42px, 0);
  }
  20% {
    clip: rect(37px, 9999px, 43px, 0);
  }
  25% {
    clip: rect(38px, 9999px, 9px, 0);
  }
  30% {
    clip: rect(34px, 9999px, 93px, 0);
  }
  35% {
    clip: rect(18px, 9999px, 84px, 0);
  }
  40% {
    clip: rect(100px, 9999px, 75px, 0);
  }
  45% {
    clip: rect(15px, 9999px, 4px, 0);
  }
  50% {
    clip: rect(14px, 9999px, 10px, 0);
  }
  55% {
    clip: rect(4px, 9999px, 75px, 0);
  }
  60% {
    clip: rect(17px, 9999px, 55px, 0);
  }
  65% {
    clip: rect(75px, 9999px, 57px, 0);
  }
  70% {
    clip: rect(39px, 9999px, 84px, 0);
  }
  75% {
    clip: rect(96px, 9999px, 54px, 0);
  }
  80% {
    clip: rect(45px, 9999px, 25px, 0);
  }
  85% {
    clip: rect(60px, 9999px, 100px, 0);
  }
  90% {
    clip: rect(5px, 9999px, 6px, 0);
  }
  95% {
    clip: rect(49px, 9999px, 57px, 0);
  }
  100% {
    clip: rect(54px, 9999px, 90px, 0);
  }
}