<style> h1 { display: none; } #catphotoapp { display: unset; text-decoration: none; } span::after { content: "Hello World"; } @keyframes myspan { 0% {content: "Hello World";} 3% {content: "Hello Worl";} 6% {content: "Hello Wor";} 9% {content: "Hello Wo";} 12% {content: "Hello W";} 15% {content: "Hello ";} 18% {content: "Hello";} 21% {content: "Hell";} 24% {content: "Hel";} 27% {content: "He";} 30% {content: "H";} 33% {content: "";} 36% {content: "C";} 39% {content: "Ca";} 42% {content: "Cat";} 45% {content: "CatP";} 48% {content: "CatPh";} 51% {content: "CatPho";} 54% {content: "CatPhot";} 57% {content: "CatPhoto";} 60% {content: "CatPhotoA";} 63% {content: "CatPhotoAp";} 66% {content: "CatPhotoApp";} 69% {content: "CatPhotoApp";} } span::after { animation-name: myspan; animation-duration: 15s; animation-iteration-count: infinite; } </style>