JSFiddle - React, Tailwind, and code Playground

by luka kupunia

HTML

<div class="box">
  <div class="_box"></div>
  <div class="__box"></div>
</div>

CSS

body {
  margin: 0;
}
div.box {
  width: 100%;
  height: 6px;
  position: relative;
  overflow: hidden;
}
div._box {
  width: 100%;
  height: 100%;
  position: absolute;
  background: green;
  animation: a 1.5s linear forwards , b 3s linear infinite 1.5s ;
  background: linear-gradient(to left ,#8BC53F , #009345 , #0D79AA , #00B3EF , #00B3EF );
}
div.__box {
  width: 100%;
  height: 100%;
  position: absolute;
  animation: c 3s linear infinite ;
  background: linear-gradient(to right ,#8BC53F , #009345 , #0D79AA , #00B3EF , #00B3EF );
  transform: translateX(-100%);
}
@keyframes a {
  100% { transform: translateX(100%) }
}
@keyframes b {
  from { transform : translateX(-100%) }
  to { transform: translateX(100%) }
}
@keyframes c {
  100%{ transform: translateX(100%) }
}
@keyframes d {
  
}