diff --git a/src/engine.rs b/src/engine.rs
index 0232553..a3690d4 100644
--- a/src/engine.rs
+++ b/src/engine.rs
@@ -35,8 +35,8 @@ impl Player {
         let dy = other.y - self.pos.y;
         let x = dx * rad.cos();
         let y = dy * rad.sin();
-        let distance = x + y;
-        println!("angle: {}, dx: {}, dy: {}, x; {}, y: {}", self.angle, dx, dy, x, y);
+        let distance = (x + y).abs();
+        // println!("angle: {}, dx: {}, dy: {}, x; {}, y: {}", self.angle, dx, dy, x, y);
         assert!(distance.is_sign_positive());
         distance
     }
@@ -205,8 +205,11 @@ impl Engine {
             if tile == Tile::Wall {
                 let wall_height = (self.h / (distance * 3.0)).min(self.h);
                 let wall_color = match pos {
-                    p if p.x.fract() == 0.0 => [0.2, 0.2, 0.9, 1.0],
-                    _ => [0.2, 0.9, 0.2, 1.0],
+                    p if (p.x.trunc() + p.y.trunc()) % 4.0 == 0.0 => [0.2, 0.2, 0.9, 1.0],
+                    p if (p.x.trunc() + p.y.trunc()) % 4.0 == 1.0 => [0.4, 0.4, 0.9, 1.0],
+                    p if (p.x.trunc() + p.y.trunc()) % 4.0 == 2.0 => [0.6, 0.6, 0.9, 1.0],
+                    p if (p.x.trunc() + p.y.trunc()) % 4.0 == 3.0 => [0.7, 0.3, 0.9, 1.0],
+                    _ => [1.0, 0.0, 0.0, 1.0],
                 };
                 println!("ray: {}, angle: {}, wall at {:?}, distance: {}", n, ray_angle, pos, distance);
                 rectangle(wall_color,