body {
    background-color: black;
}

.container {
    background-image: linear-gradient(#120230, #000);
    position: fixed;
    inset: 0;
}

.space {
    --size: 2px;
    --space-layer:
        4vw 50vh 0 red,
        18vw 88vh 0 white;
    background-color: white;
    width: var(--size);
    height: var(--size);
    box-shadow: var(--space-layer);
    position: absolute;
    left: 0;
    top: 0;
    opacity: 75%;
    animation: moveStars var(--duration, 20s) linear infinite;
    border-radius: 100%;

}

@keyframes moveStars {
    from {
        transform: translateY(0);
    }
    to{
        transform: translateY(-100vh);
    }
}