/* Animación de scroll vertical */
@keyframes scrollCredits {
    0% {
        transform: translateY(500px);
    }

    100% {
        transform: translateY(-100%);
    }
}

.credits-scroll {
    /*
    una sola vez
    animation: scrollCredits 30s linear forwards;*/
    /*varias veces*/
    animation: scrollCredits 220s linear infinite;

}