diff --git a/src/main.rs b/src/main.rs
index d267182..c58146a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -100,25 +100,27 @@ fn main() -> Result<(), Box<dyn Error>> {
 		let mut f = BufReader::new(f);
 		load_mesh(&mut f)?
 	};
-	let m_view = ypr_to_mat(vec3(135.0 * PI / 180.0, -30.0 * PI / 180.0, 0.0f32));
-	let m_camera = transpose(&m_view);
-	let img = render(mesh.as_slice(), |off| {
-		// perspective projection
-		let base = vec3(0.0, 0.0, -40.0);
-		let ray = vec3(off.x, off.y, 2.0);
-
-		// orthographic projection
-		// let base = vec3(off.x, off.y, -10.0);
-		// let ray = vec3(0.0, 0.0, 1.0);
-
-		(m_camera * base, m_camera * ray)
-	});
-
 	let window = show_image::create_window("Raytracing", WindowOptions::default())?;
-	let image = ImageView::new(ImageInfo::rgb8(W as u32, H as u32), img.data());
-	window.set_image("image", image)?;
-	window.wait_until_destroyed()?;
-	Ok(())
+	loop {
+		for phi in 0..360 {
+			let m_view = ypr_to_mat(vec3((135.0 + phi as f32) * PI / 180.0, -30.0 * PI / 180.0, 0.0f32));
+			let m_camera = transpose(&m_view);
+			let img = render(mesh.as_slice(), |off| {
+				// perspective projection
+				let base = vec3(0.0, 0.0, -40.0);
+				let ray = vec3(off.x, off.y, 2.0);
+
+				// orthographic projection
+				// let base = vec3(off.x, off.y, -10.0);
+				// let ray = vec3(0.0, 0.0, 1.0);
+
+				(m_camera * base, m_camera * ray)
+			});
+
+			let image = ImageView::new(ImageInfo::rgb8(W as u32, H as u32), img.data());
+			window.set_image("image", image)?;
+		}
+	}
 }
 
 fn edge_dist(a: Vec3, b: Vec3, base: Vec3, dir: Vec3) -> f32 {