img {
  animation-duration: 0.1s;
  animation-name: shake;
  animation-iteration-count: infinite;
}

@keyframes shake {
  from {
    transform: translateX(-50%) rotate(2deg);
  }

  50% {
    transform: translateX(-50%) rotate(-2deg);
  }

  to {
    transform: translateX(-50%) rotate(2deg);
  }
}