@-moz-keyframes blink {
    0% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }

    100% {
        opacity: 1;
    }
}
/* Firefox */
@-webkit-keyframes blink {
    0% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }

    100% {
        opacity: 1;
    }
}
/* Webkit */
@-ms-keyframes blink {
    0% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }

    100% {
        opacity: 1;
    }
}
/* IE */
@keyframes blink {
    0% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }

    100% {
        opacity: 1;
    }
}
/* Opera */

.blink {
  
    -moz-transition: all 0.5s ease-in-out;
    -webkit-transition: all 0.5s ease-in-out;
    -o-transition: all 0.5s ease-in-out;
    -ms-transition: all 0.5s ease-in-out;
    transition: all 0.5s ease-in-out;
    -moz-animation: blink normal 1.5s infinite ease-in-out; /* Firefox */
    -webkit-animation: blink normal 1.5s infinite ease-in-out; /* Webkit */
    -ms-animation: blink normal 1.5s infinite ease-in-out; /* IE */
    animation: blink normal 1.5s infinite ease-in-out; /* Opera */
}