@keyframes twinkling {
    0% {
        opacity: 0.1;
        filter: alpha(opacity=10);
    }

    50% {
        opacity: 1;
        filter: alpha(opacity=100);
    }

    100% {
        opacity: 0.1;
        filter: alpha(opacity=10);
    }
}

#newmsg.active {
    background: inherit;
    left: 0;
    top: 0;
    z-index: -2;
    animation: twinkling 0.6s ease-in-out infinite;
}