.parpadea {
    animation-name: parpadeo;
    animation-duration: 1s;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
  
    -webkit-animation-name:parpadeo;
    -webkit-animation-duration: 1s;
    -webkit-animation-timing-function: linear;
    -webkit-animation-iteration-count: infinite;
  }
  
  @-moz-keyframes parpadeo{
    0% { opacity: 1.0; }
    50% { opacity: 0.0; }
    100% { opacity: 1.0; }
  }
  
  @-webkit-keyframes parpadeo {
    0% { opacity: 1.0; }
    50% { opacity: 0.0; }
     100% { opacity: 1.0; }
  }
  
  @keyframes parpadeo {
    0% { opacity: 1.0; }
     50% { opacity: 0.0; }
    100% { opacity: 1.0; }
  }