z = -100;
        left.rotation.x = -90 * Math.PI / 180;
        left.rotation.y = -90 * Math.PI / 180;

        let frontdiv = document.createElement('div');
        frontdiv.className = 'front';
        let front = new THREE.CSS3DObject(frontdiv);
        front.position.y = 50;
        front.position.z = -100;
        front.rotation.x = -90 * Math.PI / 180;

        let backdiv = document.createElement('div');
        backdiv.className = 'back';
        let back = new THREE.CSS3DObject(backdiv);
        b