<div class="container">
  <h1 class="text-red blink-hard">Hard Blink</h1>
  <h1 class="text-red blink-soft">Soft Blink</h1>  
</div>
.container {
  width: 75%;
  margin: 0 auto;
  font-family: sans-serif;
}
h1 {
  float:left;
  width: 50%;
  text-align: center;
  margin-top: 3rem;
}
.text-red {
  color: red;
}
.blink-hard {
  animation: blinker 1s step-end infinite;
}
.blink-soft {
  animation: blinker 1.5s linear infinite;
}
@keyframes blinker {
  50% {
    opacity: 0;
  }
}
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