diff --git a/src/main.rs b/src/main.rs
index ee28cd8..1d7881b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -10,6 +10,7 @@ fn generate_png(n: u32, m: u32, width: u32, height: u32) {
     let mut img: RgbaImage = ImageBuffer::new(width, height);
 
     for (x, y, pixel) in img.enumerate_pixels_mut() {
+        // Centrage
         let xf = (x as f64 / width as f64) * 2.0 - 1.0;
         let yf = (y as f64 / height as f64) * 2.0 - 1.0;