const positions = [[-0.5, 0.1, -0.6], [0.5, 0.1, -0.6], [-0.5, 0.1, 0.6], [0.5, 0.1, 0.6]]; positions.forEach(pos => const wheel = new THREE.Mesh(wheelGeo, wheelMat); wheel.rotation.z = Math.PI / 2; wheel.position.set(pos[0], pos[1], pos[2]); group.add(wheel); );