Footer de iframe
span {
height: 300px;
width: 100%;
background-image: url("https://media0.giphy.com/media/q4voi8znbYANE5GtYI/200w.gif?cid=82a1493be5x4cl4vyd563z9h5qtd3tpxvavrp9hej723yrg0&ep=v1_gifs_related&rid=200w.gif&ct=g");
background-position: 0 -1000px;
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
animation: fire 4s linear infinite;
}
