.blink {
  animation: blink 2s infinite;
}

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

.heartbeat {
  animation: heartbeat 2s infinite;
}

@keyframes heartbeat {
  0% {
    transform:scale(1)
  }
  50% {
    transform:scale(1.4)
  }
  100% {
    transform:scale(1)
  }
}