<html>
  <head>
    <meta charset=utf-8>
    <style>
      @font-face {
        font-family: RobotoFlex;
        src: url('RobotoFlex-VariableFont_GRAD,XTRA,YOPQ,YTAS,YTDE,YTFI,YTLC,YTUC,opsz,slnt,wdth,wght.ttf') format('woff2-variations');
      }

      p {
        font-family: RobotoFlex, sans-serif;
        animation: 3s cubic-bezier(.97,.01,.42,1.52) infinite alternate foo;
      }

      @keyframes foo {
        0% {
          font-variation-settings: "XTRA" 200, "YTAS" 400;
        }
        100% {
 