@-webkit-keyframes shake {
0% {opacity:0.8;}
50% {opacity: 0.2;}
100% {opacity: 0.8;}
}

@keyframes shake {
0% {opacity:0.8;}
50% {opacity: 0.2;}
100% {opacity: 0.8;}
}

.shake {
-webkit-animation: shake 1.2s infinite;
animation: shake 1.2s infinite;
}