body {
    margin: 0;
    background: black;
}

canvas {
    width: 100vh;
    height: 100vh;
    position: fixed;
    margin: 0 calc(50vw - 50vh);
    
    animation: rot 10s infinite linear;
}

@keyframes rot {
    from { transform: rotate(0deg) }
    to { transform: rotate(360deg) }
}