out folder

src/main.rs

@@ -19,7 +19,7 @@ fn generate_png(n: u32, m: u32, width: u32, height: u32) {
         *pixel = Rgb([brigh, brigh, brigh]);
     }
 
-    let filename = format!("chladni_{}_{}.png", n, m);
+    let filename = format!("out/chladni_{}_{}.png", n, m);
     img.save(&filename).unwrap();
     println!("{}", filename);
 }