@-moz-keyframes blink {
 0% {
   opacity: 1;
 }
 50% {
   opacity: 0;
 }
 100% {
   opacity: 1;
 }
}

@-webkit-keyframes blink {
 0% {
   opacity: 1;
 }
 50% {
   opacity: 0;
 }
 100% {
   opacity: 1;
 }
}

@-o-keyframes blink {
 0% {
   opacity: 1;
 }
 50% {
   opacity: 0;
 }
 100% {
   opacity: 1;
 }
}

@keyframes blink {
 0% {
    opacity: 1;
 }
 50% {
    opacity: 0;
 }
 100% {
    opacity: 1;
 }
}

blink {
  -webkit-animation: blink 1s steps(1) infinite;
  -moz-animation: blink 1s steps(1) infinite;
  -o-animation: blink 1s steps(1) infinite;
  animation: blink 1s steps(1) infinite;
}