@keyframes swing{20%{transform:rotate3d(0,0,1,15deg);}40%{transform:rotate3d(0,0,1,-10deg);}60%{transform:rotate3d(0,0,1,5deg);}80%{transform:rotate3d(0,0,1,-5deg);}to{transform:rotate3d(0,0,1,0deg);}}.swing{transform-origin:top center;animation-name:swing;}