anicollection/animations/attention_seekers/flash.css

AniCollection, The easiest way to find, use and share CSS3 animations.

/*
 *@name flash
 *@className flash animated
 *@cssCode true
 *@editionLink codepen.io
 *@author Dan Eden
 *@source Animate.css
 *@sourceUrl http://daneden.github.io/animate.css/
 *@issues https://github.com/daneden/animate.css/issues
 *@license MIT
 */
@keyframes flash {
  0%, 100%, 50% {
    opacity: 1
  }
  25%,
  75% {
    opacity: 0
  }
}

.flash {
  animation-name: flash
}