JSFiddle - React, Tailwind, and code Playground

HTML

<p id="grup">Nume grup</p>

CSS

p {
    animation-duration: 2s;   
    animation-name: efectGrup;
    animation-iteration-count: infinite;
    -webkit-animation-duration: 2s;
    -webkit-animation-name: efectGrup;
    -webkit-animation-iteration-count: infinite;
}

@-webkit-keyframes efectGrup {
    0% { opacity: 0; }
    50% { opacity: 1; }
    100% { opacity: 0; }
}

@-keyframes efectGrup {
    0% { opacity: 0; }
    50% { opacity: 1; }
    100% { opacity: 0; }
}