<div class="container">
  <div class="text">
    <b>100 s<span>u</span>bs</b>
  </div>
</div>

@import url(//fonts.googleapis.com/css?family=Pacifico);
* {
  margin: 0;
  padding: 0;
}
.container {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background-image: url("https://images.unsplash.com/photo-1472803828399-39d4ac53c6e5?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2242&q=80");
  background-size: cover;
  background-position: center center;
}
.text {
  b {
    font: 400 25vh "Pacifico";
    letter-spacing: -5px;
    color: #fee;
    text-shadow: 0 0px 10px, 0 0 1em #560a86, 0 0 0.5em #560a86,
      0 0 0.1em #560a86, 0 10px 3px #333;
    span {
      animation: flicker linear infinite 2s;
    }
  }
}

@keyframes flicker {
  75% {
    color: inherit;
    text-shadow: inherit;
  }
  76% {
    color: #222;
  }
  77% {
    color: inherit;
    text-shadow: none;
  }
  78% {
    color: inherit;
    text-shadow: inherit;
  }
  79% {
    color: #222;
    text-shadow: none;
  }
  80% {
    color: inherit;
    text-shadow: inherit;
  }
  90% {
    color: #222;
    text-shadow: none;
  }
  90.5% {
    color: inherit;
    text-shadow: inherit;
  }
}