@keyframes moveBack{0%{transform:translateY(0)}to{transform:translateY(calc(50% + 28px))}}.RETRO_PLANE{transform:rotateX(75deg);&>div{transform:translateY(0);background-image:linear-gradient(to right,#0000 30%,var(--c) 50%,#0000 70%);background-position-y:100%;mask-image:linear-gradient(90deg,#000 2px,#0000 0),linear-gradient(180deg,#000 2px,#0000 0);mask-size:60px 60px;mask-repeat:repeat;mask-position:50% 0;animation:moveBack 50s linear infinite}}