.twitch-status a:before { 
  content: '● ';
  color: red;
  -webkit-animation: blink 1s steps(5, start) 2;
  animation: blink 1s steps(5, start) 2;
}

@-webkit-keyframes blink {
 to {
        visibility: hidden;
    }
}

@keyframes blink {
 to {
        visibility: hidden;
    }
}