Elle does a typing

index.html

<h1 class="message-wrapper" style="text-align:center;white-space:pre-wrap;">
  <span>Work more</span>
  <ul class="message">
    <li><span>effectively</span></li>
    <li><span>inclusively</span></li>
    <li><span>sustainably</span></li>
    <li><span>intentionally</span></li>
  </ul>
  <br>
  <span>Live more fully.</span>
</h1>

style.css

h1.message-wrapper {
    white-space: nowrap !important;
  }
  h1.message-wrapper > span {
    vertical-align: middle;
  }
  ul.message { 
    position: relative;
    vertical-align: middle;
    margin: 0;
    padding: 0;
    display: inline-block;
    overflow: hidden;
    line-height: 1.25em; /* this is the line-height of the h1 */
    height: 1.25em; /* with some space for the ascenders/descenders */
  }
 
  ul.message li {
    list-style: none;
    text-align: left;
    position: relative;
    top: 0;
    /* the 3s here are the length of the ::after animation */
    animation: slideit calc(4 * 3s) steps(4) infinite;
  }
   
  @keyframes slideit {
    100% { top: calc(-4 * 1.25em); }
  }

  ul.message li span {
    display: inline-block;
    position: relative;
    line-height: 1.25em;
  }

  .message li span::after{
    content: "";
    position: absolute;
    left: 0;
    height: 100%;
    width: 100%;
    background: #fffff5;
    border-left: 2px solid currentColor;
    animation: typetytype 3s steps(10) infinite;
  }

  @keyframes typetytype {
    40%, 60% { left: calc(100% + 10px); }
    100% { left: 0; }
  }

I changed whatever your h1 used to be to have a class, and some extra markup inside.

I also added a giant <style> block at the end of your index.html with these styles, BUT i think you can just add them at the end of whatever stylesheet you have that you edit normally