.text-rainbow-animation{font-family:Arial Black,sans-serif;font-size:15px;background-image:linear-gradient(to right,red,orange,#ff0,green,#00f,indigo,violet,red);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-size:200% auto;animation:rainbow-animation 10s linear infinite}@keyframes rainbow-animation{0%{background-position:-100% center}to{background-position:200% center}}