Setup basic resources

src/components/mod.rs

@@ -1,4 +1,2 @@
-use crate::prelude::*;
-
 pub struct Name(pub String);
 pub struct Player;

src/main.rs

@@ -1,10 +1,12 @@
 mod components;
 mod plugins;
+mod resources;
 mod systems;
 
 mod prelude {
     pub use crate::components::*;
     pub use crate::plugins::*;
+    pub use crate::resources::*;
     pub use crate::systems::*;
     pub use bevy::prelude::*;
 }

src/plugins/mod.rs

@@ -4,7 +4,8 @@ pub struct PlayerPlugin;
 
 impl Plugin for PlayerPlugin {
     fn build(&self, app: &mut AppBuilder) {
-        app.add_startup_system(add_player.system())
+        app.insert_resource(GreetTimer(Timer::from_seconds(2.0, true)))
+            .add_startup_system(add_player.system())
             .add_system(greet_player.system());
     }
 }

src/resources/mod.rs

@@ -0,0 +1,3 @@
+use crate::prelude::*;
+
+pub struct GreetTimer(pub Timer);

src/systems/mod.rs

@@ -7,8 +7,14 @@ pub fn add_player(mut commands: Commands) {
         .insert(Name("Player 1".to_string()));
 }
 
-pub fn greet_player(query: Query<&Name, With<Player>>) {
+pub fn greet_player(
-    for name in query.iter() {
+    query: Query<&Name, With<Player>>,
-        println!("Hello, {}!", name.0);
+    time: Res<Time>,
+    mut timer: ResMut<GreetTimer>,
+) {
+    if timer.0.tick(time.delta()).just_finished() {
+        for name in query.iter() {
+            println!("Hello, {}!", name.0);
+        }
     }
 }