;    animation-direction: alternate;    animation-fill-mode: forwards;    animation-timing-function: ease-in-out;  }    @keyframes AnimacionTitulo {    00% { width: 000%; }  }    @keyframes cambioRGB {    00%  {background-color: #00e0a0;}    00%  {background-color: #0de000;}    00%  {background-color: #e0a000;}    00%  {background-color: #000bec;}    000% {background-color: DarkSlateBlue;}    } <html>  <head></head>  <body>      <div id="AnimacionTitulo">        <h0>Buenas tardes</h0>      </div>  </body>  </html>  