diff --git a/src/config.rs b/src/config.rs
index 3ecf8bd..1eb2b26 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -35,6 +35,7 @@ pub fn load_from_file(path: PathBuf, debug_mode: bool) -> Config {
 }
 
 pub fn write_default_config(path: PathBuf) -> () {
+    // Write default config file to target path
     let parent = path.parent().unwrap();
     let _ = fs::create_dir_all(parent);
     let _ = fs::write(path, DEFAULT_CONFIG);
@@ -101,12 +102,17 @@ fn load_ansi_color(value: i64) -> Color {
 fn load_gradient(ini: &Ini, debug_mode: bool) -> ComputableColor {
     let mut keys = Vec::new();
 
+    // Iterate over all gradient keys, they are defined like that in the config file:
+    //   gradient_key_1=...
+    //   gradient_key_2=...
+    //   gradient_key_N=...
     let mut i = 0;
     while let Some(key) = ini.get("gradient", &format!("gradient_key_{}", i)) {
         keys.push(parse_hex_color(&key));
         i += 1;
     }
 
+    // Generate gradient loop if needed
     if !debug_mode && ini.getbool("gradient", "gradient_loop").unwrap().unwrap() {
         let mut loop_keys = keys.clone();
         loop_keys.reverse();
@@ -115,6 +121,7 @@ fn load_gradient(ini: &Ini, debug_mode: bool) -> ComputableColor {
         }
     }
 
+    // I use half characters for debug mode rendering, so we take display size * 2
     let steps: usize = if debug_mode {
         debug::DEBUG_COLOR_DISPLAY_SIZE * 2
     } else {
diff --git a/src/main.rs b/src/main.rs
index 1366569..0517de5 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -51,11 +51,12 @@ enum Commands {
 fn main() -> io::Result<()> {
     let cli = Cli::parse();
 
-    // Load config
+    // Load config from either given config file
     let mut default_generated = false;
     let config_file = if let Some(custom_config) = cli.config {
         PathBuf::from(custom_config)
     } else {
+        // Or default one, located in ~/.config/tlock
         let config_file = config_dir().unwrap().join("tlock").join("config");
         if !config_file.exists() {
             write_default_config(config_file.clone());
@@ -65,7 +66,10 @@ fn main() -> io::Result<()> {
         config_file
     };
 
+    // Regenerate default config if needed
     if cli.regenerate_default {
+        // If a config file already exists and it's not the first time the config
+        // is being generated, then ask for confirmation
         if !default_generated && config_file.exists() && !cli.yes {
             println!("A config file is already located at {:?}", config_file);
             print!("Do you really want to recreate it ? [y/N] ");
@@ -82,15 +86,19 @@ fn main() -> io::Result<()> {
             }
         }
 
+        // Otherwhise, just write default config to target path
         write_default_config(config_file.clone());
         println!("Done.");
         return Ok(());
     }
 
+    // If no config file was found, throw an error
+    // NOTE: this should never happen
     if !config_file.exists() {
         panic!("ERROR: Configuration file not found");
     }
 
+    // Enable debug mode if needed, and load config
     let debug_mode = match &cli.command {
         Some(Commands::Debug {}) => true,
         _ => false,
@@ -98,6 +106,7 @@ fn main() -> io::Result<()> {
     let mut config = config::load_from_file(config_file, debug_mode);
     let mut stdout = io::stdout();
 
+    // Print debug infos
     if debug_mode {
         debug::print_debug_infos(&mut config)?;
         return Ok(());
@@ -107,6 +116,7 @@ fn main() -> io::Result<()> {
     execute!(stdout, terminal::EnterAlternateScreen, cursor::Hide)?;
     let _ = terminal::enable_raw_mode()?;
 
+    // Start the appropriate mode
     match &cli.command {
         Some(Commands::Chrono {}) => modes::chrono::main_loop(&mut config)?,
         Some(Commands::Timer { duration }) => {
diff --git a/src/modes/chrono.rs b/src/modes/chrono.rs
index 372e9b6..b240c25 100644
--- a/src/modes/chrono.rs
+++ b/src/modes/chrono.rs
@@ -172,6 +172,7 @@ fn render_frame(
         *scroll_offset = lapses.len() - max_items;
     }
 
+    // Iterate over lapses, skipping with scroll offset and taxing N items
     for (i, lapse) in lapses
         .iter()
         .rev()
diff --git a/src/modes/debug.rs b/src/modes/debug.rs
index e2ed57b..98cce79 100644
--- a/src/modes/debug.rs
+++ b/src/modes/debug.rs
@@ -27,10 +27,15 @@ pub fn print_debug_infos(config: &mut Config) -> io::Result<()> {
 
     print_debug_label("Color scheme")?;
     let width = config.color.get_keys_count();
+    // If width is one, it is a single color
     if width == 1 {
         queue!(stdout, style::SetBackgroundColor(config.color.get_value()))?;
         write!(stdout, "{}", " ".repeat(DEBUG_COLOR_DISPLAY_SIZE))?;
-    } else {
+    }
+    // Otherwhise, it's a gradient
+    else {
+        // Use half characters to display two colors in one character using background
+        // and foreground
         for _ in 0..width / 2 {
             queue!(stdout, style::SetForegroundColor(config.color.get_value()))?;
             config.color.update();