#[derive(Component)]
struct SelfieStick;

fn move_camera(mut selfie_stick_query: Query<&mut Transform, With<SelfieStick>>) {
    for mut stick_transform in selfie_stick_query.iter_mut() {
        stick_transform.translation.x -= 0.01;
        stick_transform.translation.y += 0.01;
    }
}

fn setup_scene(
    mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<StandardMaterial>>,
) {
    let camera_transform = Transform::from_xyz(5.0, 5.0, 5.0);

    commands
        .spawn((TransformBundle::IDENTITY, SelfieStick))
        .with_children(|parent| {
            parent.spawn((
                Camera3dBundle {
                    transform: camera_transform.looking_at(Vec3::ZERO, Vec3::Y),
                    ..default()
                },
                GizmoCamera,
            ));
        });