* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    overflow: hidden;
    height: 100vh;
}

span {
    position: absolute;
    background-size: cover;
    pointer-events: none;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    animation: anim 4s linear infinite;
}

@keyframes anim {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -900%) rotate(-720deg);
        opacity: 0;
    }
}