.blink {
    -webkit-animation: 1.5s linear infinite condemned_blink_effect; /* for Safari 4.0 - 8.0 */
    animation: 1.5s linear infinite condemned_blink_effect;
  }
  
  /* for Safari 4.0 - 8.0 */
  @-webkit-keyframes condemned_blink_effect { 
    0% {
      visibility: hidden;
    }
    50% {
      visibility: hidden;
    }
    100% {
      visibility: visible;
    }
  }
  
  @keyframes condemned_blink_effect {
    0% {
      visibility: hidden;
    }
    50% {
      visibility: hidden;
    }
    100% {
      visibility: visible;
    }
  }