const gui = new GUI();

			const scene = new Scene();
			scene.background = new Color( 0x444444 );

			const camera = new PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 50 );
			camera.position.z = 30;

			const renderer = new WebGLRenderer( { antialias: true } );
			renderer.setPixelRatio( window.devicePixelRatio );
			renderer.setSize( window.innerWidth, window.innerHeight );
			document.body.appendChild( renderer.domElement );

			const orbit = new OrbitControls( camera, renderer.dom