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                <!DOCTYPE html>
<html lang="en">
    <meta charset="utf-8"/>
    <script type="text/javascript" src=""></script>
<!-- レンダラーの出力を保持し、表示する -->
<div id="WebGL-output">

<script type="text/javascript">

    function init() {

        const width = 960;
        const height = 540;

        // レンダラーを作る
        const renderer = new THREE.WebGLRenderer();
        renderer.setClearColor(new THREE.Color(0xEEEEEE));
        renderer.setSize(window.innerWidth, window.innerHeight);

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

        // カメラを作る
        const camera = new THREE.PerspectiveCamera(90, width / height);
        camera.position.set(0, 0, +700);

        // 立方体を作る
        const geometry = new THREE.BoxGeometry(400, 400, 400);
        const material = new THREE.MeshNormalMaterial();
        const box = new THREE.Mesh(geometry, material);


        // ここの関数の内容が毎フレーム実行される
        function tick() {
            box.rotation.y += 0.03;
            box.rotation.x += 0.01;
            renderer.render(scene, camera);
            // レンダリングする

    window.onload = init