.card:nth-child(4n+3) {
    background-color: #CCD540;
}
.card:nth-child(4n+3) .card_lockup:after {
    position: absolute;
    background: radial-gradient(#CCD540, #CCD540 50%, transparent 0, transparent);
    background-position: 50% 50%;
    background-size: 8px 8px;
    content: "";
    display: block;
}