@keyframes blinker {
    from { opacity: 1; }
    to { opacity: 0; }
}
span.outlineddiv {
    background: red;
    width: 11px;
    height: 11px;
    border-radius: 18px;
    display: inline-block;
    animation: blinker 1.5s cubic-bezier(.5,0,1,1) infinite alternate;
}