h1{background:linear-gradient(342deg,red,orange,#ff0,green,#00f,indigo,violet);background-size:1400% 1400%;-webkit-background-clip:text;-webkit-text-fill-color:transparent;animation:AnimationName 30s ease infinite}@keyframes AnimationName{0%{background-position:17% 0}50%{background-position:84% 100%}to{background-position:17% 0}}