.blink {
    animation: blink-animation 0.3s steps(2, start) infinite;
    -webkit-animation: blink-animation 0.3s steps(2, start) infinite;
}
@keyframes blink-animation {
    to {
        visibility: hidden;
    }
}
@-webkit-keyframes blink-animation {
    to {
        visibility: hidden;
    }
}