.shaker {
    /* Start the shake animation and make the animation last for 0.5 seconds */
    animation: shake 3s ease infinite;
    /* When the animation is finished, start again */
}
@keyframes shake {
    0% { transform:translate(0,0) }
    1.78571% { transform:translate(5px,0) }
    3.57143% { transform:translate(0,0) }
    5.35714% { transform:translate(5px,0) }
    7.14286% { transform:translate(0,0) }
    8.92857% { transform:translate(5px,0) }
    10.71429% { transform:translate(0,0) }
    100% { transform:translate(0,0) }
}