diff --git a/Predator.ttf b/resources/Predator.ttf
similarity index 100%
rename from Predator.ttf
rename to resources/Predator.ttf
diff --git a/airhorn_alarm.mp3 b/resources/airhorn_alarm.mp3
similarity index 100%
rename from airhorn_alarm.mp3
rename to resources/airhorn_alarm.mp3
diff --git a/src/lib.rs b/src/lib.rs
index e655a0e..e9990fa 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,13 @@
-pub const AIRHORN: &[u8] = include_bytes!("../airhorn_alarm.mp3");
-pub const PREDATOR_FONT: &[u8] = include_bytes!("../Predator.ttf");
+use std::time::Duration;
+
+pub const AIRHORN: &[u8] = include_bytes!("../resources/airhorn_alarm.mp3");
+pub const PREDATOR_FONT: &[u8] = include_bytes!("../resources/Predator.ttf");
+
+pub(crate) const MIN_REPAINT: Duration = Duration::from_millis(100);
+pub(crate) const MAX_REPAINT: Duration = Duration::from_millis(250);
+
+pub(crate) const DIGIT_FACTOR: f32 = 0.4;
+pub(crate) const TEXT_FACTOR: f32 = 0.2;
 
 pub mod cli;
 pub mod timer;
diff --git a/src/timer/eframe_app.rs b/src/timer/eframe_app.rs
new file mode 100644
index 0000000..fc21789
--- /dev/null
+++ b/src/timer/eframe_app.rs
@@ -0,0 +1,28 @@
+use std::time::Instant;
+
+use super::{state::*, Timer};
+use crate::{MAX_REPAINT, MIN_REPAINT};
+
+impl eframe::App for Timer {
+    fn update(&mut self, ctx: &egui::Context, frame: &mut eframe::Frame) {
+        ctx.request_repaint_after(MAX_REPAINT);
+        let height = ctx.input().screen_rect().height();
+        egui::CentralPanel::default().show(ctx, |ui| {
+            match self.state {
+                TimerState::Unstarted => self.unstarted(ui, height),
+                TimerState::Running(cs) => {
+                    let dur = Instant::now() - cs.updated;
+                    let dur = MIN_REPAINT.saturating_sub(dur);
+                    ctx.request_repaint_after(dur);
+                    self.running(ui, height, cs);
+                }
+                TimerState::Paused(cs) => self.paused(ui, height, cs),
+                TimerState::Finished => self.finished(ui, height),
+            }
+            // check for quit key
+            if ui.input().key_pressed(egui::Key::Q) || ui.input().key_pressed(egui::Key::Escape) {
+                frame.close();
+            }
+        });
+    }
+}
diff --git a/src/timer.rs b/src/timer/mod.rs
similarity index 82%
rename from src/timer.rs
rename to src/timer/mod.rs
index e6e0817..edab29c 100644
--- a/src/timer.rs
+++ b/src/timer/mod.rs
@@ -1,17 +1,14 @@
 use std::time::{Duration, Instant};
 
 use clap::Parser;
-use eframe::{App, CreationContext};
 use egui::{Color32, Direction, FontId, Layout, RichText, Ui};
 use egui_extras::{Size, StripBuilder};
 
-use crate::{cli::Cli, util::*, AIRHORN, PREDATOR_FONT};
+use crate::{cli::Cli, util::*, AIRHORN, DIGIT_FACTOR, PREDATOR_FONT, TEXT_FACTOR};
 
-const MIN_REPAINT: Duration = Duration::from_millis(100);
-const MAX_REPAINT: Duration = Duration::from_millis(250);
-
-const DIGIT_FACTOR: f32 = 0.4;
-const TEXT_FACTOR: f32 = 0.2;
+mod state;
+use state::{ChronoState, TimerState};
+mod eframe_app;
 
 #[derive(Debug, Clone, Copy)]
 pub enum CountDirection {
@@ -28,60 +25,8 @@ pub struct Timer {
     alarm: Option<Vec<u8>>,
 }
 
-#[derive(Debug, Clone, Copy)]
-enum TimerState {
-    Unstarted,
-    Paused(ChronoState),
-    Running(ChronoState),
-    Finished,
-}
-
-impl PartialEq for TimerState {
-    fn eq(&self, other: &Self) -> bool {
-        matches!(
-            (self, other),
-            (Self::Paused(_), Self::Paused(_))
-                | (Self::Running(_), Self::Running(_))
-                | (Self::Unstarted, Self::Unstarted)
-                | (Self::Finished, Self::Finished)
-        )
-    }
-}
-
-impl Eq for TimerState {}
-
-#[derive(Debug, Clone, Copy)]
-struct ChronoState {
-    updated: Instant,
-    remaining: Duration,
-}
-
-impl App for Timer {
-    fn update(&mut self, ctx: &egui::Context, frame: &mut eframe::Frame) {
-        ctx.request_repaint_after(MAX_REPAINT);
-        let height = ctx.input().screen_rect().height();
-        egui::CentralPanel::default().show(ctx, |ui| {
-            match self.state {
-                TimerState::Unstarted => self.unstarted(ui, height),
-                TimerState::Running(cs) => {
-                    let dur = Instant::now() - cs.updated;
-                    let dur = MIN_REPAINT.saturating_sub(dur);
-                    ctx.request_repaint_after(dur);
-                    self.running(ui, height, cs);
-                }
-                TimerState::Paused(cs) => self.paused(ui, height, cs),
-                TimerState::Finished => self.finished(ui, height),
-            }
-            // check for quit key
-            if ui.input().key_pressed(egui::Key::Q) || ui.input().key_pressed(egui::Key::Escape) {
-                frame.close();
-            }
-        });
-    }
-}
-
 impl Timer {
-    pub fn new(ctx: &CreationContext) -> Self {
+    pub fn new(ctx: &eframe::CreationContext) -> Self {
         let cli = Cli::parse();
         let predator = cli.predator;
         let seconds = cli.hours.unwrap_or(0) * 3600
diff --git a/src/timer/state.rs b/src/timer/state.rs
new file mode 100644
index 0000000..e08bf5b
--- /dev/null
+++ b/src/timer/state.rs
@@ -0,0 +1,29 @@
+use std::time::{Duration, Instant};
+
+#[derive(Debug, Clone, Copy)]
+pub(crate) enum TimerState {
+    Unstarted,
+    Paused(ChronoState),
+    Running(ChronoState),
+    Finished,
+}
+
+impl PartialEq for TimerState {
+    fn eq(&self, other: &Self) -> bool {
+        matches!(
+            (self, other),
+            (Self::Paused(_), Self::Paused(_))
+                | (Self::Running(_), Self::Running(_))
+                | (Self::Unstarted, Self::Unstarted)
+                | (Self::Finished, Self::Finished)
+        )
+    }
+}
+
+impl Eq for TimerState {}
+
+#[derive(Debug, Clone, Copy)]
+pub(crate) struct ChronoState {
+    pub updated: Instant,
+    pub remaining: Duration,
+}