.blinking {
    -webkit-animation: blink 1.5s ease-in-out infinite alternate;
    -moz-animation: blink 1.5s ease-in-out infinite alternate;
    animation: blink 1.5s ease-in-out infinite alternate;
}
@-webkit-keyframes blink {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}
@-moz-keyframes blink {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}
@keyframes blink {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}