body {
    margin-left: 0%; margin-right: 0%;
    background-color: grey;
    color: black;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    /* text-align: center; */
}

div {
    background-color:white;
}

blink {
    -webkit-animation: 3s linear infinite condemned_blink_effect; /* for Safari 4.0 - 8.0 */
    animation: 3s linear infinite condemned_blink_effect;
}

    /* for Safari 4.0 - 8.0 */
@-webkit-keyframes condemned_blink_effect {
    0% {
	visibility: hidden;
    }
    50% {
	visibility: hidden;
    }
    100% {
	visibility: visible;
    }
}

@keyframes condemned_blink_effect {
    0% {
	visibility: hidden;
    }
    50% {
	visibility: hidden;
    }
    100% {
	visibility: visible;
    }
}