Start submodule to impl the "Get ready" spinner

src/lib.rs

@@ -1,4 +1,5 @@
 pub mod config;
+mod preparation_widget;
 mod title_screen;
 
 use crate::config::{BACKGROUND_COLOR, PLAYER_SHIP_COLOR, SHIP_ROTATION, SHIP_THRUST, WINDOW_SIZE};
@@ -13,7 +14,7 @@ pub struct AsteroidPlugin;
 
 impl Plugin for AsteroidPlugin {
     fn build(&self, app: &mut App) {
-        app.add_plugins(title_screen::GameMenuPlugin)
+        app.add_plugins((title_screen::GameMenuPlugin, preparation_widget::preparation_widget_plugin))
             .insert_resource(ClearColor(BACKGROUND_COLOR))
             .insert_resource(WorldSize {
                 width: WINDOW_SIZE.x,

src/preparation_widget.rs

@@ -0,0 +1,33 @@
+use bevy::prelude::*;
+
+use crate::GameState;
+
+pub fn preparation_widget_plugin(app: &mut App) {
+	app.add_systems(OnEnter(GameState::GetReady), spawn_get_ready)
+		.add_systems(OnExit(GameState::GetReady), despawn_get_ready)
+		.add_systems(Update, (animate_get_ready_widget).run_if(in_state(GameState::GetReady)));
+}
+
+/// Marker component for things on the get-ready indicator
+#[derive(Component)]
+struct OnReadySetGo;
+
+/// Newtype wrapper for `Timer`. Used to count down during the "get ready" phase.
+#[derive(Component)]
+struct ReadySetGoTimer(Timer);
+
+fn spawn_get_ready(
+    mut commands: Commands,
+){
+    todo!();
+}
+
+fn despawn_get_ready(
+    mut commands: Commands,
+){
+    todo!();
+}
+
+fn animate_get_ready_widget(){
+    todo!();
+}