Adds base code from the bevy getting started guide

src/game_plugin/mod.rs

@@ -0,0 +1,67 @@
+
+use bevy::prelude::*;
+
+pub struct GamePlugin;
+
+impl Plugin for GamePlugin
+{
+	fn build(&self, app: &mut App) 
+	{
+        app.insert_resource(GreetTimer(Timer::from_seconds(2.0, TimerMode::Repeating)))
+            .add_systems(Startup, add_people)
+            .add_systems(Update, (hello_world, (update_people, greet_people).chain()));
+    }
+
+}
+
+#[derive(Resource)]
+struct GreetTimer(Timer);
+
+#[derive(Component)]
+struct Person;
+
+#[derive(Component)]
+struct Name(String);
+
+fn add_people(mut commands: Commands) 
+{
+    commands.spawn((Person, Name("Elaina Proctor".to_string())));
+    commands.spawn((Person, Name("Renzo Hume".to_string())));
+    commands.spawn((Person, Name("Zayna Nieves".to_string())));
+}
+
+// Just reading the timer in this one since greet_people already ticks it
+// We could use ().chain() to force hello_world to happen after greet_people
+// so the print out is always on the same frame.
+fn hello_world(timer: ResMut<GreetTimer>,) 
+{
+    if timer.0.finished()
+    {
+        println!("hello world!");
+    }
+}
+
+fn greet_people(time: Res<Time>, mut timer: ResMut<GreetTimer>, query: Query<&Name, With<Person>>) 
+{
+    // update our timer with the time elapsed since the last update
+    // if that caused the timer to finish, we say hello to everyone
+    if timer.0.tick(time.delta()).just_finished() 
+    {
+        for name in &query 
+        {
+            println!("hello {}!", name.0);
+        }
+    }
+}
+
+fn update_people(mut query: Query<&mut Name, With<Person>>) 
+{
+    for mut name in &mut query 
+    {
+        if name.0 == "Elaina Proctor" 
+        {
+            name.0 = "Elaina Hume".to_string();
+            break; // We don’t need to change any other names
+        }
+    }
+}

src/main.rs

@@ -1,7 +1,14 @@
 
+use bevy::prelude::*;
 
+mod game_plugin;
+
+use game_plugin::GamePlugin;
 
 fn main() 
 {
-    println!("Hello, world!");
+    App::new()
+        .add_plugins((DefaultPlugins, GamePlugin))
+    .run();
+
 }