demo = {
var dom = html`
<div style="width:100%;height:400px;">
<canvas id="canvas3d" style="width:100%;height:100%;"></canvas>
</div>
`;
const app = new SpeRuntime.Application();
app.start(await FileAttachment("scene.json").url());
setTimeout(() => {
app._renderer.setSize(400, 400);
}, 1000);
return dom;
}