[Bevy] How can I make this red square be on the bottom instead of being on the top?

[Vellu]

Title says everything

pub fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
    commands.
        spawn(NodeBundle {
            style: Style {
                size: Size {
                    width: Val::Px(50.),
                    height: Val::Px(50.)
                },
                ..default()
            },

            background_color: Color::RED.into(), ..default()
        });
}