@keyframes blink {
  50% {
    opacity: 0.5;
  }
  100% {
    transform: rotate(360deg);
  }
}

#initial-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  font-family: sans-serif;
  font-size: 18px;
}

#initial-content > img {
  animation: blink 2s linear infinite;
}