move parse out of loop

src/main.rs

@@ -44,7 +44,7 @@ fn main() {
         let pattern_c = Arc::clone(&pattern);
         let v = pattern_c.read().expect("could not read pattern");
         let mut lights = lock_c.write().unwrap();
-        (*v).iter().for_each(move |x: Box<dyn Pattern>| {
+        (*v).iter().for_each(move |x: &Box<dyn Pattern>| {
             x.execute(&mut lights);
         });
     }