.blink {
  -webkit-animation: 2s blinker ease infinite;
  -moz-animation: 2s blinker ease infinite;
  -ms-animation: 2s blinker ease infinite;
  -o-animation: 2s blinker ease infinite;
  animation: 2s blinker ease infinite;
}

@keyframes blinker {
  from, to {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}

@-moz-keyframes blinker {
  from, to {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}

@-webkit-keyframes blinker {
  from, to {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}

@-ms-keyframes blinker {
  from, to {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}

@-o-keyframes blinker {
  from, to {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}