JSFiddle - React, Tailwind, and code Playground

HTML

<br/>
<br/>
<br/>
<div class='thisone'></div>

CSS

.thisone {
-webkit-animation-name: slybounce;
-webkit-animation-duration: 3s;
-webkit-animation-timing-function: ease-in-out;
-webkit-animation-iteration-count: infinite;
-webkit-animation-delay: 0;
-webkit-animation-play-state: running;
-moz-animation-name: slybounce;
-moz-animation-duration: 3s;
-moz-animation-timing-function: ease-in-out;
-moz-animation-iteration-count: infinite;
-moz-animation-delay: 0;
-moz-animation-play-state: running;
    
  width: 50px;
  height: 30px;
  border-radius: 4px;
  -moz-border-radius: 4px;
  background: red;
  display: block;
}


@-webkit-keyframes slybounce {
  0% {
    -webkit-transform: translate(0, -5);
  }
  50% {
    -webkit-transform: translate(0, 5px);
  }
  100% {
    -webkit-transform: translate(0, -5);
  }
}

@-moz-keyframes slybounce {
  0% {
    -moz-transform: translate(0, -5);
  }
  50% {
    -moz-transform: translate(0, 5px);
  }
  100% {
    -moz-transform: translate(0, -5);
  }
}