diff --git a/application.cpp b/application.cpp
index 269cb64..c9b6e76 100644
--- a/application.cpp
+++ b/application.cpp
@@ -1,81 +1,60 @@
 #include "application.h"
 #include <SFML/Graphics/Color.hpp>
 #include <SFML/Window/Event.hpp>
-#include <SFML/Window/Keyboard.hpp>
 
 const sf::Time TIME_PER_FRAME = sf::seconds(1.f / 60.f);
 
 Application::Application() :
-    game_window({1280, 720}, "Test")
+    _game_window({1280, 720}, "Test"),
+    _debug(true)
 {
-    float x = game_window.getSize().x;
-    float y = game_window.getSize().y;
-    pulse_mask.setSize({x, y});
-    pulse_mask.setOrigin(0.f, 0.f);
-    pulse_mask.setFillColor(sf::Color(255, 0, 0, 0));
-    pulse_mask_green.setSize({x, y});
-    pulse_mask_green.setOrigin(0.f, 0.f);
-    pulse_mask_green.setFillColor(sf::Color(0, 255, 0, 0));
-    font.loadFromFile("VeraMono.ttf");
-    font2.loadFromFile("VeraMono.ttf");
-    text.setFont(font);
-    text.setPosition(60, 60);
-    text.setFillColor(sf::Color(255, 255, 255));
-    text.setCharacterSize(25);
-
-    grade.setFont(font2);
-    grade.setPosition(100, 100);
-    grade.setFillColor(sf::Color(255, 255, 255, 0));
-    grade.setCharacterSize(35);
+    _font.loadFromFile("VeraMono.ttf");
+    _grade.setFont(_font);
+    _grade.setPosition(160, 160);
+    _grade.setFillColor(sf::Color(255, 255, 255, 0));
+    _grade.setCharacterSize(35);
 }
 
 void Application::run()
 {
-    game_window.display();
-    sf::Int64 iter = 9000 + (1412162 * 25);
-    while (iter > 9000)
+    // BPM of METEOR is 170.
+    // Length is 1:14
+    // I calculated that the time between beats is about 1412162 microseconds
+    sf::Int64 iter = 1412162 * 25;
+    while (iter > 0)
     {
         Note note(iter, iter + 412162);
-        timeline.push(note);
+        _timeline.push(note);
         iter -= 1412162;
     }
+    //    //    //    //    //    //    //    //
 
+    _music.openFromFile("/home/naiji/METEOR.flac");
+    _music.play();
+    _music.setVolume(5);
+
+    _game_window.display();
+
+    startGameLoop();
+}
+
+
+static bool isOneFramePassed(const sf::Time& time_since_last_update)
+{
+    return time_since_last_update >= TIME_PER_FRAME;
+}
+
+void Application::startGameLoop()
+{
     sf::Clock timer;
     sf::Time time_since_last_update = sf::Time::Zero;
-    music.openFromFile("/home/naiji/METEOR.flac");
-    music.play();
-    while (game_window.isOpen())
+
+    while (_game_window.isOpen())
     {
-        sf::Event event;
-        while (game_window.pollEvent(event))
-        {
-            if (event.type == sf::Event::Closed)
-                game_window.close();
-
-            if (event.type == sf::Event::KeyPressed && event.key.code == sf::Keyboard::Z && !timeline.empty())
-            {
-                const auto current_note = timeline.top();
-                const auto grade_result = current_note.onTap(Note::Arrow::UP, music.getPlayingOffset().asMicroseconds());
-                pulse_mask.setFillColor(sf::Color(255, 0, 0, 255));
-                switch (grade_result.rating)
-                {
-                    case (NoteGrade::Rating::BAD):
-                        grade.setString("BAD");
-                        grade.setFillColor(sf::Color(255, 255, 255, 255));
-                    break;
-
-                    case (NoteGrade::Rating::GREAT):
-                        grade.setString("GREAT");
-                        grade.setFillColor(sf::Color(255, 255, 0, 255));
-                    break;
-                }
-
-            }
-
-        }
+        input();
 
         time_since_last_update += timer.restart();
-        if (time_since_last_update >= TIME_PER_FRAME)
+        if (isOneFramePassed(time_since_last_update))
         {
             time_since_last_update -= TIME_PER_FRAME;
             update();
@@ -84,42 +63,137 @@ void Application::run()
     }
 }
 
+static sf::Text makeGradeString(const NoteGrade::Rating& rating)
+{
+    sf::Text ret;
+    switch (rating)
+    {
+    case (NoteGrade::Rating::BAD):
+        ret.setString("BAD");
+        ret.setFillColor(sf::Color(255, 255, 255, 255));
+        break;
+
+    case (NoteGrade::Rating::GREAT):
+        ret.setString("GREAT");
+        ret.setFillColor(sf::Color(255, 255, 0, 255));
+        break;
+
+    case (NoteGrade::Rating::WRONG):
+        ret.setString("WRONG");
+        ret.setFillColor(sf::Color(120, 120, 120, 255));
+        break;
+
+    case (NoteGrade::Rating::GOOD):
+        ret.setString("GOOD");
+        ret.setFillColor(sf::Color(255, 100, 120, 255));
+        break;
+    }
+
+    return ret;
+}
+
+void Application::input()
+{
+    sf::Event event;
+    while (_game_window.pollEvent(event))
+    {
+        switch (event.type)
+        {
+        default:
+            break;
+
+        case (sf::Event::Closed):
+            _game_window.close();
+            break;
+
+        case (sf::Event::KeyPressed):
+            onKeyPressed(event.key.code);
+            break;
+        }
+    }
+}
+
+static Note::Arrow keyToArrow(const sf::Keyboard::Key &key)
+{
+    switch (key)
+    {
+    case sf::Keyboard::A:
+    case sf::Keyboard::Left:
+    case sf::Keyboard::Num4:
+        return Note::Arrow::LEFT;
+
+    case sf::Keyboard::W:
+    case sf::Keyboard::Up:
+    case sf::Keyboard::Num8:
+        return Note::Arrow::UP;
+
+    case sf::Keyboard::D:
+    case sf::Keyboard::Right:
+    case sf::Keyboard::Num6:
+        return Note::Arrow::RIGHT;
+
+    case sf::Keyboard::S:
+    case sf::Keyboard::Down:
+    case sf::Keyboard::Num2:
+        return Note::Arrow::DOWN;
+
+    default:
+        return Note::Arrow::NONE;
+    }
+}
+
+void Application::onKeyPressed(const sf::Keyboard::Key &key)
+{
+    if (key == sf::Keyboard::D)
+    {
+        _debug.toggle();
+        return;
+    }
+
+    const auto arrow = keyToArrow(key);
+
+    if (arrow != Note::Arrow::NONE)
+    {
+        _debug.onUserTap();
+
+        if (!_timeline.empty())
+        {
+            const auto current_note = _timeline.top();
+            const auto grade_result = current_note.onTap(arrow, _music.getPlayingOffset().asMicroseconds());
+            _grade = makeGradeString(grade_result.rating);
+        }
+    }
+}
+
 void Application::update()
 {
-    if (!timeline.empty() && timeline.top().deathOffset() <= music.getPlayingOffset().asMicroseconds())
+    const auto microseconds = _music.getPlayingOffset().asMicroseconds();
+
+    if (!_timeline.empty() && _timeline.top().offset() <= microseconds)
     {
-        timeline.pop();
-        pulse_mask_green.setFillColor(sf::Color(0, 255, 0, 255));
+        _debug.onBeat();
     }
 
-    text.setString(std::to_string(music.getPlayingOffset().asSeconds()));
-
-    if (pulse_mask.getFillColor().a > 0)
+    if (!_timeline.empty() && _timeline.top().deathOffset() <= microseconds)
     {
-        const auto alpha = pulse_mask.getFillColor().a - 25;
-        pulse_mask.setFillColor(sf::Color(255, 0, 0, alpha < 0 ? 0 : alpha));
+        _timeline.pop();
+        _debug.onDeath();
     }
 
-    if (pulse_mask_green.getFillColor().a > 0)
-    {
-        const auto alpha = pulse_mask_green.getFillColor().a - 25;
-        pulse_mask_green.setFillColor(sf::Color(0, 255, 0, alpha < 0 ? 0 : alpha));
-    }
+    _debug.update(microseconds);
 
-    if (grade.getFillColor().a > 0)
+    if (_grade.getFillColor().a > 0)
     {
-        const auto alpha = grade.getFillColor().a - 20;
-        grade.setFillColor(sf::Color(255, 255, 255, alpha < 0 ? 0 : alpha));
+        const auto alpha = _grade.getFillColor().a - 20;
+        _grade.setFillColor(sf::Color(255, 255, 255, alpha < 0 ? 0 : alpha));
     }
 
 }
 
 void Application::draw()
 {
-    game_window.clear();
-    game_window.draw(pulse_mask);
-    game_window.draw(pulse_mask_green);
-    game_window.draw(text);
-    game_window.draw(grade);
-    game_window.display();
+    _game_window.clear();
+    _debug.drawOn(_game_window);
+    _game_window.draw(_grade);
+    _game_window.display();
 }
diff --git a/application.h b/application.h
index c937a94..3e67278 100644
--- a/application.h
+++ b/application.h
@@ -1,15 +1,13 @@
 #ifndef APPLICATION_H
 #define APPLICATION_H
 
-#include <SFML/Graphics/RenderWindow.hpp>
 #include <SFML/Audio/Music.hpp>
 #include <SFML/System/Clock.hpp>
-#include <SFML/Graphics/Text.hpp>
-#include <SFML/Graphics/Font.hpp>
-#include <SFML/Graphics/RectangleShape.hpp>
+#include <SFML/Window/Keyboard.hpp>
 
 #include <stack>
 
+#include "debughelper.h"
 #include "note.h"
 
 class Application
@@ -17,22 +15,24 @@ class Application
 public:
     Application();
     void run();
+    void input();
     void update();
     void draw();
 
 private:
-    sf::RenderWindow game_window;
-    sf::Music music;
-    sf::RectangleShape pulse_mask;
-    sf::RectangleShape pulse_mask_green;
+    sf::RenderWindow _game_window;
+    sf::Music _music;
 
-    std::stack<Note> timeline;
-    sf::Int64 time_since_last_tick;
-    sf::Int64 last_stamp;
-    sf::Font font;
-    sf::Font font2;
-    sf::Text text;
-    sf::Text grade;
+    std::stack<Note> _timeline;
+    sf::Int64 _time_since_last_tick;
+    sf::Int64 _last_stamp;
+    sf::Font _font;
+    sf::Text _grade;
+
+    DebugHelper _debug;
+
+    void startGameLoop();
+    void onKeyPressed(const sf::Keyboard::Key& key);
 };
 
 #endif // APPLICATION_H
diff --git a/debughelper.cpp b/debughelper.cpp
new file mode 100644
index 0000000..55a8077
--- /dev/null
+++ b/debughelper.cpp
@@ -0,0 +1,84 @@
+#include "debughelper.h"
+
+DebugHelper::DebugHelper(bool init) :
+    _toggled(init)
+{
+    _bpm_pulse.setSize({460, 360});
+    _bpm_pulse.setOrigin(0.f, 0.f);
+    _bpm_pulse.setFillColor(sf::Color(255, 0, 0, 0));
+    _tap_pulse.setSize({460, 360});
+    _tap_pulse.move(460.f, 0.f);
+    _tap_pulse.setFillColor(sf::Color(0, 255, 0, 0));
+    _death_pulse.setSize({460, 360});
+    _death_pulse.move(460.f, 360.f);
+    _death_pulse.setFillColor(sf::Color(0, 100, 255, 0));
+
+    _font.loadFromFile("VeraMono.ttf");
+
+    _time_print.setFont(_font);
+    _time_print.setPosition(60, 60);
+    _time_print.setFillColor(sf::Color(255, 255, 255));
+    _time_print.setCharacterSize(25);
+}
+
+void DebugHelper::toggle()
+{
+    _toggled = !_toggled;
+}
+
+static bool isVisible(const sf::Shape* shape)
+{
+    return shape->getFillColor().a > 0;
+}
+
+void DebugHelper::update(const sf::Int64 &microseconds)
+{
+    _time_print.setString(std::to_string(microseconds));
+
+    if (isVisible(&_bpm_pulse))
+    {
+        const auto new_alpha = _bpm_pulse.getFillColor().a - 25;
+        _bpm_pulse.setFillColor(sf::Color(255, 0, 0, (new_alpha < 0) ? 0 : new_alpha));
+    }
+
+    if (isVisible(&_tap_pulse))
+    {
+        const auto new_alpha = _tap_pulse.getFillColor().a - 25;
+        _tap_pulse.setFillColor(sf::Color(0, 255, 0, (new_alpha < 0) ? 0 : new_alpha));
+    }
+
+    if (isVisible(&_death_pulse))
+    {
+        const auto new_alpha = _death_pulse.getFillColor().a - 25;
+        _death_pulse.setFillColor(sf::Color(0, 100, 255, (new_alpha < 0) ? 0 : new_alpha));
+    }
+}
+
+void DebugHelper::drawOn(sf::RenderWindow &game_window) const
+{
+    if (_toggled)
+    {
+        game_window.draw(_bpm_pulse);
+        game_window.draw(_tap_pulse);
+        game_window.draw(_death_pulse);
+        game_window.draw(_time_print);
+    }
+}
+
+void DebugHelper::onUserTap()
+{
+    const sf::Uint8 alpha = 255;
+    _tap_pulse.setFillColor(sf::Color(255, 0, 0, alpha));
+}
+
+void DebugHelper::onBeat()
+{
+    const sf::Uint8 alpha = 255;
+    _bpm_pulse.setFillColor(sf::Color(0, 255, 0, alpha));
+}
+
+void DebugHelper::onDeath()
+{
+    const sf::Uint8 alpha = 255;
+    _death_pulse.setFillColor(sf::Color(0, 100, 255, alpha));
+}
diff --git a/debughelper.h b/debughelper.h
new file mode 100644
index 0000000..348105f
--- /dev/null
+++ b/debughelper.h
@@ -0,0 +1,30 @@
+#ifndef DEBUGHELPER_H
+#define DEBUGHELPER_H
+
+#include <SFML/Graphics/RenderWindow.hpp>
+#include <SFML/Graphics/RectangleShape.hpp>
+#include <SFML/Graphics/Font.hpp>
+#include <SFML/Graphics/Text.hpp>
+
+class DebugHelper
+{
+public:
+    DebugHelper(bool init = true);
+
+    void toggle();
+    void update(const sf::Int64& microseconds);
+    void drawOn(sf::RenderWindow &game_window) const;
+    void onUserTap();
+    void onBeat();
+    void onDeath();
+
+private:
+    bool _toggled;
+    sf::RectangleShape _bpm_pulse;
+    sf::RectangleShape _tap_pulse;
+    sf::RectangleShape _death_pulse;
+    sf::Font _font;
+    sf::Text _time_print;
+};
+
+#endif // DEBUGHELPER_H
diff --git a/note.cpp b/note.cpp
index 3f97888..ce865b0 100644
--- a/note.cpp
+++ b/note.cpp
@@ -7,6 +7,11 @@ Note::Note(microsec offset, microsec death_offset, Note::Arrow type) :
     _type(type)
 {}
 
+microsec Note::offset() const noexcept
+{
+    return _offset;
+}
+
 microsec Note::deathOffset() const noexcept
 {
     return _death_offset;
@@ -24,10 +29,10 @@ NoteGrade Note::onTap(Arrow arrow_type, microsec tap_time_stamp) const
 NoteGrade Note::calculatePrecision(microsec odds) const
 {
     NoteGrade ret;
-    if (odds < 500000)
+    if (odds < 412162)
     {
         ret.score = 50;
-        ret.rating =  NoteGrade::Rating::GREAT;
+        ret.rating = NoteGrade::Rating::GREAT;
     }
 
     return ret;
diff --git a/note.h b/note.h
index 7844cad..0f24dcc 100644
--- a/note.h
+++ b/note.h
@@ -25,15 +25,17 @@ public:
         UP,
         RIGHT,
         DOWN,
-        LEFT
+        LEFT,
+
+        NONE
     };
 
     Note(microsec offset, microsec death_offset, Note::Arrow type = Note::Arrow::UP);
 
     NoteGrade onTap(Arrow arrow_type, microsec tap_time_stamp) const;
+    microsec offset() const noexcept;
     microsec deathOffset() const noexcept;
 
-
 private:
     microsec _offset;
     microsec _death_offset;