diff --git a/src/main.rs b/src/main.rs
index 283197b..02b361f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -26,15 +26,11 @@ async fn main() {
     loop {
         // fade trails (doesnt really work)
         let frame_time = get_frame_time();
-        for x in 0..MAP_WIDTH {
-            for y in 0..MAP_HEIGHT {
-                let mut current_pixel = trail_map.get_pixel(x, y);
-                current_pixel.r -= 0.1 * frame_time;
-                current_pixel.g -= 0.1 * frame_time;
-                current_pixel.b -= 0.1 * frame_time;
-                trail_map.set_pixel(x, y, current_pixel);
+        trail_map.bytes.iter_mut().for_each(|b| {
+            if *b > 0 {
+                *b -= 1;
             }
-        }
+        });
         // actions
         ants.iter_mut().for_each(|ant| {
             ant.walk(frame_time, &mut trail_map);