diff --git a/src/main.rs b/src/main.rs
index 29238c0..545b253 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -72,18 +72,25 @@ fn setup(
     mut commands: Commands,
     mut materials: ResMut<Assets<ColorMaterial>>,
     boid_mesh: Res<BoidMesh>,
+    windows: Query<&Window>,
 ) {
+    let window = windows.get_single().unwrap();
+    let half_width = window.resolution.width() / 4.;
+    let half_height = window.resolution.height() / 2.;
+
     let boid_color = materials.add(Color::from(tailwind::NEUTRAL_50));
 
     let mut small_rng = rand::rngs::SmallRng::from_entropy();
-    let lower_bound = -100.;
-    let upper_bound = 100.;
+    let lower_width = -half_width;
+    let upper_width = half_width;
+    let lower_height = -half_height;
+    let upper_height = half_height;
 
     for i in 0..1000 {
         use std::f32::consts::TAU;
 
-        let x = small_rng.gen_range(lower_bound..=upper_bound);
-        let y = small_rng.gen_range(lower_bound..=upper_bound);
+        let x = small_rng.gen_range(lower_width..=upper_width);
+        let y = small_rng.gen_range(lower_height..=upper_height);
 
         let angle = small_rng.gen_range(-TAU..=TAU);