diff --git a/snake-game/examples/schedules_test.rs b/snake-game/examples/schedules_test.rs
index 9e3cb9a..66e1b2b 100644
--- a/snake-game/examples/schedules_test.rs
+++ b/snake-game/examples/schedules_test.rs
@@ -1,15 +1,16 @@
-use bevy::{app::FixedMain, prelude::*};
+use bevy::prelude::*;
 
 fn main() {
     App::new() //
         .add_plugins(DefaultPlugins)
         .add_systems(StateTransition, state_transition)
         .add_systems(PreStartup, pre_startup)
-        .add_systems(Startup, startup)
+        .add_systems(Startup, (startup, setup))
         .add_systems(PostStartup, post_startup)
         .add_systems(First, first)
         .add_systems(PreUpdate, pre_update)
-        .add_systems(FixedMain, fixed_main)
+        .add_systems(Update, (update, check_space_pressed))
+        .add_systems(PostUpdate, post_update)
         .run();
 }
 
@@ -37,6 +38,21 @@ fn pre_update() {
     info!("PreUpdate");
 }
 
-fn fixed_main() {
-    info!("FixedMain");
+fn update() {
+    info!("Update");
 }
+
+fn post_update() {
+    info!("PostUpdate");
+}
+
+fn check_space_pressed(input: Res<ButtonInput<KeyCode>>, mut commands: Commands) {
+    if input.just_pressed(KeyCode::Space) {
+        commands.trigger(TestEvent0);
+    }
+}
+
+fn setup(mut commands: Commands) {}
+
+#[derive(Event)]
+struct TestEvent0;