idHelper );

			const axesHelper = new THREE.AxesHelper( 5 );
			scene.add( axesHelper );

			// animate
			const clock = new THREE.Clock();

			function animate() {

				requestAnimationFrame( animate );

				const deltaTime = clock.getDelta();

				if ( currentGltf ) {

					const vrmCore = currentGltf.userData.vrmCore;
					const humanoid = vrmCore.humanoid;

					// tweak bones
					const s = 0.25 * Math.PI * Math.sin( Math.PI * clock.elapsedTime );
					humanoid.getNormalizedBoneNode( 'head' ).rotation