language swap to rust, using Bevy ECS, rotating colour swapping cube, movement needs translating

src/main.rs

@@ -0,0 +1,77 @@
+use bevy::prelude::*;
+
+fn main() {
+    App::new()
+        .add_plugins(DefaultPlugins)
+        .add_systems(Startup, setup)
+        .add_systems(Update, rotate_cube)
+        .run();
+}
+
+#[derive(Component)]
+struct RotatingCube {
+    rotation_speed: f32,
+}
+
+fn setup(
+    mut commands: Commands,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
+) {
+    // Camera
+    commands.spawn((
+        Camera3d::default(),
+        Transform::from_xyz(10.0, 10.0, 10.0).looking_at(Vec3::ZERO, Vec3::Y),
+    ));
+
+    // Cube
+    commands.spawn((
+        Mesh3d(meshes.add(Cuboid::new(2.0, 2.0, 2.0))),
+        MeshMaterial3d(materials.add(Color::srgb(1.0, 0.0, 0.0))),
+        Transform::from_xyz(0.0, 1.0, 0.0),
+        RotatingCube {
+            rotation_speed: 2.0,
+        },
+    ));
+
+    // Light (DOESN'T WORK)
+    commands.spawn((
+        PointLight {
+            intensity: 1000000.0,
+            shadows_enabled: true,
+            ..default()
+        },
+        Transform::from_xyz(10.0, 10.0, 10.0).looking_at(Vec3::ZERO, Vec3::Y),
+    ));
+
+    // Plane
+    commands.spawn((
+        Mesh3d(meshes.add(Plane3d::new(Vec3::Y, Vec2::splat(50.0)))),
+        MeshMaterial3d(materials.add(Color::srgb(0.3, 0.5, 0.3))),
+    ));
+}
+
+fn rotate_cube(
+    mut query: Query<
+        (
+            &mut Transform,
+            &RotatingCube,
+            &MeshMaterial3d<StandardMaterial>,
+        ),
+        Without<Camera3d>,
+    >,
+    time: Res<Time>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
+) {
+    for (mut transform, rotating, material_handle) in query.iter_mut() {
+        transform.rotate_y(rotating.rotation_speed * time.delta_secs());
+
+        // Get mutable reference to the actual material
+        if let Some(material) = materials.get_mut(&material_handle.0) {
+            let blue = (time.elapsed_secs().sin() + 1.0) / 2.0;
+            let red = 1.0 - blue;
+            let color = Color::srgb(red, 0.0, blue); // cycling colours
+            material.base_color = color;
+        }
+    }
+}