/*==== flashs =====*/
.flash {
    -webkit-animation-name: flash;
    animation-name: flash;
    -webkit-animation-duration: 50s;
    animation-duration: 50s;
    -webkit-animation-fill-mode: both;
    animation-fill-mode: both;
    animation-iteration-count: infinite;
}

@-webkit-keyframes flash {
    from,
    50%,
    to {
        opacity: 1;
    }

    25%,
    75% {
        opacity: 0;
    }
}

@keyframes flash {
    from,
    50%,
    to {
        opacity: 1;
    }

    25%,
    75% {
        opacity: 0;
    }
}