Css blinking style. Just add this class to element you want to blink.

blinking.css

.blinking {
    animation-name: blinker;
    animation-duration: 1s;
    animation-timing-function: linear;
    animation-iteration-count: infinite;

    -webkit-animation-name: blinker;
    -webkit-animation-duration: 1s;
    -webkit-animation-timing-function: linear;
    -webkit-animation-iteration-count: infinite;
}

@-moz-keyframes blinker {  
    0% { opacity: 1.0; }
    50% { opacity: 0.0; }
    100% { opacity: 1.0; }
}

@-webkit-keyframes blinker {  
    0% { opacity: 1.0; }
    50% { opacity: 0.0; }
    100% { opacity: 1.0; }
}

@keyframes blinker {  
    0% { opacity: 1.0; }
    50% { opacity: 0.0; }
    100% { opacity: 1.0; }
}