:root {
    --s: 1;
}

body {
    background-color: black;
}

.point {
    position: absolute;

    background-color: white;
    width: 1px;
    height: 1px;
    border-radius: 0px;
    transform-origin: 50% 50%;
    margin-top: 0px;
    transform: rotate(0deg) scale(1);

    animation-name: spin;
    animation-duration: 0s;
    animation-iteration-count: infinite;
    animation-timing-function: ease-in-out;
}

@keyframes spin {
    0% {
        margin-top: 0px;
    }
    40% {
        margin-top: 250px;
    }
    60% {
        margin-top: 250px;
    }
    100% {
        margin-top: 0px;
    }
}