body {
    margin: 0;
    padding: 0;
}

canvas {
    height: 100vh;
    width: 100vw;
    margin: 0;
    padding: 0;
    background: grey url("click_icon.svg") no-repeat center;
    background-size: 100px 100px;
}

canvas.loading {
    background: black url("loading.gif") no-repeat center;
}

canvas.loaded {
    background: black;
}

canvas.error {
    background: black url("error.svg") no-repeat center;
}