Wave Text Animation Pure CSS

<div class="textContainer">
 <h1 class="d_f bouncingAnim">
     <span>T</span>
     <span>R</span>
     <span>A</span>
     <span>I</span>
     <span>N</span>
     <span>I</span>
     <span>N</span>
     <span>G</span>
     <!-- Training -->
  </h1>
</div>