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                <canvas id="myCanvas"></canvas>




                 // ページの読み込みを待つ
    window.addEventListener('load', init);

    function init() {

      // サイズを指定
      const width = 960;
      const height = 540;

      // レンダラーを作成
      const renderer = new THREE.WebGLRenderer({
        canvas: document.querySelector('#myCanvas')
      renderer.setSize(width, height);

      // シーンを作成
      const scene = new THREE.Scene();

      // カメラを作成
      const camera = new THREE.PerspectiveCamera(45, width / height);
      camera.position.set(0, 0, +1000);

      // ジオメトリを作成(ドーナツ型)
      const geometry = new THREE.TorusGeometry(200, 120, 200, 200);
      const material = new THREE.MeshBasicMaterial({color: 0xA63744});
      const mesh = new THREE.Mesh(geometry, material);


      // 毎フレーム時に実行されるループイベントです
      function tick() {
        mesh.rotation.y += 0.01;
        renderer.render(scene, camera); // レンダリング