[Help] - Infinite falling animation (wordpress)

#stats {
    background-image: url(../img/illustrations/bones.png), url(../img/stats.png), url(../img/illustrations/bones1.png);
    animation: dog-bones-falling 9s linear infinite;
    animation-duration: 9s;
    animation-timing-function: linear;
    animation-delay: 0s;
    animation-iteration-count: infinite;
    animation-direction: normal;
    animation-fill-mode: none;
    animation-play-state: running;
    animation-name: dog-bones-falling;
    animation-direction: normal;
    background-repeat: no-repeat;
}

#stats {
    background-image: url(../img/illustrations/bones.png), url(../img/stats.png), url(../img/illustrations/bones1.png);
    animation: dog-bones-falling 9s linear infinite;
    animation-direction: normal;
    background-repeat: no-repeat;
    height: 100vh;
}


@keyframes dog-bones-falling {
    0% {
        background-position: 94% -100px, 96% 100px, 99% -300px
    }
    100% {
        background-position: 94% 500px, 96% 100px, 99% 500px;
    }
}