diff --git a/src/main.rs b/src/main.rs
index c5a8f6d..02abf6e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -39,11 +39,11 @@ fn main() {
         *p = res.unwrap();
     }
     let lock_c = Arc::clone(&lock);
-    let mut lights = lock_c.write().unwrap();
     loop {
         thread::sleep(time::Duration::from_millis(250));
         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>| {
             x.execute(&mut lights);
         });