JSFiddle - React, Tailwind, and code Playground

HTML

<div class="car">
  <div class="headlight"></div>
</div>

CSS

.car {
  width: 100px;
  height: 100px;
  background: black;
}

.car .headlight {
  width: 80%;
  height: 10px;
  margin: auto;
  position: relative;
  top: 80px;
  background: white;
  animation: blink 2000ms infinite;
  opacity: 1;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}