@-webkit-keyframes flash { 
  0%, 100%, 50% { opacity: 1; }
  25%, 75% { opacity: 0; }
}
@keyframes flash { 
  0%, 100%, 50% { opacity: 1; }
  25%, 75% { opacity: 0; }
}
@-webkit-keyframes pulse { 
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}
@keyframes pulse { 
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}