Horizontal vibration

.horizontal-vibration {
  animation: horizontal-vibration 0.3s linear infinite both;
}

@keyframes horizontal-vibration {
  0% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(5px);
  }
  50% {
    transform: translateX(-5px);
  }
  75% {
    transform: translateX(5px);
  }
  100% {
    transform: translateX(0);
  }
}