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        <meta charset=utf-8>
        <title>My first Three.js app</title>
            body { margin: 0; }
            canvas { width: 100%; height: 100% }
        <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/95/three.js"></script>
          // 建立舞臺
          const scene = new THREE.Scene()
          // 建立相機
          const camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 )
          // 建立渲染器
          const renderer = new THREE.WebGLRenderer()
          camera.position.z = 500
          camera.position.x = 150
          camera.position.y = 100
          // 將渲染器加入畫面
          renderer.setSize( window.innerWidth, window.innerHeight )
          document.body.appendChild( renderer.domElement )

          // mesh 為我們後面要加入的 3D 模型
          // 直接調用 scene 下的 add 方法,就可將 模型加入舞臺 
          const geometry = new THREE.BoxBufferGeometry( 100, 100, 100 );
          const material = new THREE.MeshNormalMaterial();
          const mesh = new THREE.Mesh( geometry, material );
          scene.add( mesh )

          // 將舞臺與相機加入渲染器
          renderer.render( scene, camera )
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