<>
html,
body,
p {
margin: 0;
padding: 0;
}
html,
body {
width: 100%;
height: 100%;
overflow: hidden;
}
p {
position: absolute;
}
<>
@keyframes blink {
0% {
opacity: .4;
}
50% {
opacity: 1;
}
100% {
opacity: .4;
}
}
.blink {
animation-duration: 2s;
animation-name: blink;
animation-iteration-count: infinite;
}