@keyframes tilt-shake {
  0%   { transform: rotate(0deg); }
  10%  { transform: rotate(-8deg); }
  20%  { transform: rotate(8deg); }
  30%  { transform: rotate(-6deg); }
  40%  { transform: rotate(6deg); }
  50%  { transform: rotate(0deg); }
  100% { transform: rotate(0deg); }
}
.shake {
  display: inline-block;
  transform-origin: center center;
  animation: tilt-shake 2s ease-in-out infinite;

  color: #ff0000;}