Making blinking/flashing text with CSS 3

@-webkit-keyframes blinker {
  from { opacity: 1.0; }
  to { opacity: 0.0; }
}

.waitingForConnection {
  -webkit-animation-name: blinker;
  -webkit-animation-iteration-count: infinite;
  -webkit-animation-timing-function: cubic-bezier(.5, 0, 1, 1);
  -webkit-animation-duration: 1.7s;
}

or

<div class="blink_me">BLINK ME</div>

.blink_me {
  animation: blinker 1s linear infinite;
}

@keyframes blinker {
  50% {
    opacity: 0;
  }
}