.flash {
    -moz-animation: flash 3s ease-out;
    -moz-animation-iteration-count: 1;
    -webkit-animation: flash 2s ease-out;
    -webkit-animation-iteration-count: 1;
    -ms-animation: flash 1s ease-out;
    -ms-animation-iteration-count: 1;
}

@keyframes flash {
    0% {
        background-color: transparent;
    }

    50% {
        background-color: #ff000042;
    }

    100% {
        background-color: transparent;
    }
}

@-webkit-keyframes flash {
    0% {
        background-color: transparent;
    }

    50% {
        background-color: #ff000042;
    }

    100% {
        background-color: transparent;
    }
}

@-moz-keyframes flash {
    0% {
        background-color: transparent;
    }

    50% {
        background-color: #ff000042;
    }

    100% {
        background-color: transparent;
    }
}

@-ms-keyframes flash {
    0% {
        background-color: transparent;
    }

    50% {
        background-color: #fbf8b2;
    }

    100% {
        background-color: transparent;
    }
}