diff --git a/src/main.rs b/src/main.rs
index b7841ad..439f1cc 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -8,12 +8,14 @@ use std::{thread, time};
 
 pub const LED_SIZE: usize = 450; //450
 pub const BRIGHTNESS: u8 = 150;
+pub const LOOP_WAIT: u64 = 250;
 
 fn main() {
     let p: RawColor = [0, 0, 0, 0];
     let lock = Arc::new(RwLock::new([p; LED_SIZE]));
     let mut pattern: Vec<Box<dyn Pattern>> = Vec::new();
     let read = Arc::clone(&lock);
+    /// light management
     thread::spawn(move || {
         let mut controller: Controller = ControllerBuilder::new()
     .channel(0, ChannelBuilder::new()
@@ -30,6 +32,8 @@ fn main() {
         	run_lights(&mut controller, &lights).expect("Error running lights controller.");
 	}
     });
+
+    /// pattern parsing
     let mul_string = format_multiline("unit");
     let res: Result<Vec<Box<dyn Pattern>>, ParseError> = mul_string.iter()
         .map(|x: &Vec<String>| parse_line((*x).clone()))
@@ -37,8 +41,10 @@ fn main() {
     if res.is_ok() {
         pattern = res.unwrap();
     }
+
+    /// pattern management
     loop {
-        thread::sleep(time::Duration::from_millis(250));
+        thread::sleep(time::Duration::from_millis(LOOP_WAIT));
         for p in &pattern {
             let c_lock = Arc::clone(&lock);
             let mut lights = c_lock.write().unwrap();
diff --git a/src/util/pattern.rs b/src/util/pattern.rs
index ce732f1..fe24ecb 100644
--- a/src/util/pattern.rs
+++ b/src/util/pattern.rs
@@ -7,12 +7,12 @@ use std::sync::RwLockWriteGuard;
 
 pub type ParseError = Box<dyn std::error::Error>;
 
-pub trait Pattern<'a> {
-    fn execute(&self, values: &'a mut RwLockWriteGuard<'_, [RawColor; crate::LED_SIZE]>);
+pub trait Pattern {
+    fn execute(&self, values: &mut RwLockWriteGuard<'_, [RawColor; crate::LED_SIZE]>);
     fn parse(args: Vec<String>) -> Result<Self, ParseError> where Self: Sized;
 }
 
-impl<'a> TryFrom<Vec<String>> for Box<dyn Pattern<'a>> {
+impl TryFrom<Vec<String>> for Box<dyn Pattern> {
     type Error = ParseError;
     fn try_from(s: Vec<String>) -> Result<Self, Self::Error> {
         match s[0].as_str() {
@@ -24,8 +24,8 @@ impl<'a> TryFrom<Vec<String>> for Box<dyn Pattern<'a>> {
 }
 
 struct Unit;
-impl<'a> Pattern<'a> for Unit {
-    fn execute(&self, _values: &'a mut RwLockWriteGuard<'_, [RawColor; crate::LED_SIZE]>) {}
+impl Pattern for Unit {
+    fn execute(&self, _values: &mut RwLockWriteGuard<'_, [RawColor; crate::LED_SIZE]>) {}
     fn parse(_args: Vec<String>) -> Result<Self, ParseError> {
         Ok(Unit {})
     }
@@ -37,8 +37,8 @@ struct Value {
     b: Option<u8>
 }
 
-impl<'a> Pattern<'a> for Value {
-    fn execute(&self, values: &'a mut RwLockWriteGuard<'_, [RawColor; crate::LED_SIZE]>) {
+impl Pattern for Value {
+    fn execute(&self, values: &mut RwLockWriteGuard<'_, [RawColor; crate::LED_SIZE]>) {
         for i in 0..crate::LED_SIZE {
             let mut color: RawColor = (*values)[i];
             if self.r.is_some() {
@@ -96,7 +96,7 @@ impl<'a> Pattern<'a> for Value {
     }
 }
 
-pub fn parse_line<'a>(v: Vec<String>) -> Result<Box<dyn Pattern<'a>>, ParseError> {
+pub fn parse_line(v: Vec<String>) -> Result<Box<dyn Pattern>, ParseError> {
     v.try_into()
 }