.jiggle {
    animation: jiggle 4s ease-in-out infinite;
    -webkit-animation: jiggle 4s ease-in-out infinite;
}

@keyframes jiggle {
0%, 15%, 100% {
    -webkit-transform: rotate(0);
    transform: rotate(0);
}
5% {
    -webkit-transform: rotate(2deg);
    transform: rotate(2deg);
}
10% {
    -webkit-transform: rotate(-2deg);
    transform: rotate(-2deg);
}
}