<div class="text middle" data-text="Glitch Effect">
  Glitch Effect
</div>

body{
  margin: 0;
  padding: 0;
  font-family: "montserrat",sans-serif;
  background: #000;
}

.middle{
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
}

.text{
  color: #fff;
  text-transform: uppercase;
  font-size: 60px;
  text-align: center;
  letter-spacing: 14px;
}

.text::before,.text::after{
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.text::before{
  color: #ff00c1;
  animation: glitch-effect 3s infinite;
}

.text::after{
  color: #3498db;
  animation: glitch-effect 2s infinite;
}

@keyframes glitch-effect {
  0%{
    left: -2px;
    top: -2px;
  }
  25%{
    left: 2px;
    top: 0px;
  }
  50%{
    left: -1px;
    top: 2px;
  }
  75%{
    left: 1px;
    top: -1px;
  }
  100%{
    left: 0px;
    top: -2px;
  }
}

/*
* https://www.darkcode.info/2019/03/glitch-text-effect-using-only-html-css.html
*/