@keyframes anim {
0% { transform: scale(1); }
50% { transform: scale(2); }
100% { transform: scale(1); }
}
#rond {
width:100px;
height:100px;
border-radius:50px;
background-color:green;
animation : anim 10s ease infinite;
}
#texte {
transform:scale(1);
}
<div id="rond"></div>
<div id="texte">Texte...</div>