* {
    margin: 0;
    padding: 0;
}

body {
    background-color: blue;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nuvem {
    position: fixed;
    height: 100vh;
    width: 100vw;
    animation: mover 10s infinite;
    background-image: url(/assets/nuvem.gif);
}

.main {
    height: 100vh;
    width: 100vw;
}

@keyframes mover{
    from {translate: 0px 0px}
    to {translate: 0px 100vh}
}