diff --git a/metronome.c b/metronome.c
index f02757a..a351551 100644
--- a/metronome.c
+++ b/metronome.c
@@ -20,101 +20,101 @@
 #define BEEP_DELAY_MS 50
 
 typedef enum {
-    EventTypeTick,
-    EventTypeKey,
+  EventTypeTick,
+  EventTypeKey,
 } EventType;
 
 typedef struct {
-    EventType type;
-    InputEvent input;
+  EventType type;
+  InputEvent input;
 } PluginEvent;
 
 typedef struct {
-    double bpm;
-    bool playing;
-    int beats_per_bar;
-    int note_length;
-    int current_beat;
-    FuriTimer* timer;
-    NotificationApp* notifications;
+  double bpm;
+  bool playing;
+  int beats_per_bar;
+  int note_length;
+  int current_beat;
+  FuriTimer* timer;
+  NotificationApp* notifications;
 } MetronomeState;
 
 static void render_callback(Canvas* const canvas, void* ctx) {
-    const MetronomeState* metronome_state = acquire_mutex((ValueMutex*)ctx, 25);
-    if(metronome_state == NULL) {
-        return;
-    }
+  const MetronomeState* metronome_state = acquire_mutex((ValueMutex*)ctx, 25);
+  if(metronome_state == NULL) {
+    return;
+  }
 
-    string_t tempStr;
-    string_init(tempStr);
-
-    // border around the edge of the screen
-    canvas_draw_frame(canvas, 0, 0, 128, 64);
-
-    canvas_set_font(canvas, FontPrimary);
-    
-    // draw bars/beat
-    string_printf(tempStr, "%d/%d", metronome_state->beats_per_bar, metronome_state->note_length);
-    canvas_draw_str_aligned(canvas, 64, 8, AlignCenter, AlignCenter, string_get_cstr(tempStr));
-    string_reset(tempStr);
-    // draw BPM value
-    string_printf(tempStr, "%.2f", metronome_state->bpm);
-    canvas_set_font(canvas, FontBigNumbers);
-    canvas_draw_str_aligned(canvas, 64, 24, AlignCenter, AlignCenter, string_get_cstr(tempStr));
-    string_reset(tempStr);
-
-    // draw button prompts
-    canvas_set_font(canvas, FontSecondary);
-    elements_button_left(canvas, "Slow");
-    elements_button_right(canvas, "Fast");
-    if (metronome_state->playing) {
-     elements_button_center(canvas, "Stop ");
-    } else {
-     elements_button_center(canvas, "Start");
-    }
-    elements_button_top_left(canvas, "Push");
-    elements_button_top_right(canvas, "Hold");
+  string_t tempStr;
+  string_init(tempStr);
+
+  // border around the edge of the screen
+  canvas_draw_frame(canvas, 0, 0, 128, 64);
+
+  canvas_set_font(canvas, FontPrimary);
+  
+  // draw bars/beat
+  string_printf(tempStr, "%d/%d", metronome_state->beats_per_bar, metronome_state->note_length);
+  canvas_draw_str_aligned(canvas, 64, 8, AlignCenter, AlignCenter, string_get_cstr(tempStr));
+  string_reset(tempStr);
+  // draw BPM value
+  string_printf(tempStr, "%.2f", metronome_state->bpm);
+  canvas_set_font(canvas, FontBigNumbers);
+  canvas_draw_str_aligned(canvas, 64, 24, AlignCenter, AlignCenter, string_get_cstr(tempStr));
+  string_reset(tempStr);
+
+  // draw button prompts
+  canvas_set_font(canvas, FontSecondary);
+  elements_button_left(canvas, "Slow");
+  elements_button_right(canvas, "Fast");
+  if (metronome_state->playing) {
+   elements_button_center(canvas, "Stop ");
+  } else {
+   elements_button_center(canvas, "Start");
+  }
+  elements_button_top_left(canvas, "Push");
+  elements_button_top_right(canvas, "Hold");
 
-    // draw progress bar
-    elements_progress_bar(canvas, 8, 36, 112, (float)metronome_state->current_beat/metronome_state->beats_per_bar);
+  // draw progress bar
+  elements_progress_bar(canvas, 8, 36, 112, (float)metronome_state->current_beat/metronome_state->beats_per_bar);
 
-    string_clear(tempStr);
-    release_mutex((ValueMutex*)ctx, metronome_state);
+  string_clear(tempStr);
+  release_mutex((ValueMutex*)ctx, metronome_state);
 }
 
 static void input_callback(InputEvent* input_event, FuriMessageQueue* event_queue) {
-    furi_assert(event_queue);
+  furi_assert(event_queue);
 
-    PluginEvent event = {.type = EventTypeKey, .input = *input_event};
-    furi_message_queue_put(event_queue, &event, FuriWaitForever);
+  PluginEvent event = {.type = EventTypeKey, .input = *input_event};
+  furi_message_queue_put(event_queue, &event, FuriWaitForever);
 }
 
 static void timer_callback(void* ctx) {
-    MetronomeState* metronome_state = acquire_mutex((ValueMutex*)ctx, 25);
-    metronome_state->current_beat++;
-    if (metronome_state->current_beat > metronome_state->beats_per_bar) {
-      metronome_state->current_beat = 1;
-    }
-    if (metronome_state->current_beat == 1) {
-      notification_message(metronome_state->notifications, &sequence_set_only_red_255);
-      furi_hal_speaker_start(440.0f, 1.0f);
-    } else {
-      notification_message(metronome_state->notifications, &sequence_set_only_green_255);
-      furi_hal_speaker_start(220.0f, 1.0f);
-    };
-    furi_delay_ms(BEEP_DELAY_MS);
-    notification_message(metronome_state->notifications, &sequence_reset_rgb);
-    furi_hal_speaker_stop();
-
-    release_mutex((ValueMutex*)ctx, metronome_state);
+  MetronomeState* metronome_state = acquire_mutex((ValueMutex*)ctx, 25);
+  metronome_state->current_beat++;
+  if (metronome_state->current_beat > metronome_state->beats_per_bar) {
+    metronome_state->current_beat = 1;
+  }
+  if (metronome_state->current_beat == 1) {
+    notification_message(metronome_state->notifications, &sequence_set_only_red_255);
+    furi_hal_speaker_start(440.0f, 1.0f);
+  } else {
+    notification_message(metronome_state->notifications, &sequence_set_only_green_255);
+    furi_hal_speaker_start(220.0f, 1.0f);
+  };
+  furi_delay_ms(BEEP_DELAY_MS);
+  notification_message(metronome_state->notifications, &sequence_reset_rgb);
+  furi_hal_speaker_stop();
+
+  release_mutex((ValueMutex*)ctx, metronome_state);
 }
 
 static uint32_t state_to_sleep_ticks(MetronomeState* metronome_state) {
-    // calculate time between beeps
-    uint32_t tps = furi_kernel_get_tick_frequency();
-    double multiplier = 4.0d/metronome_state->note_length;
-    double bps = (double)metronome_state->bpm / 60;
-    return (uint32_t)(round(tps / bps) - ((BEEP_DELAY_MS/1000)*tps)) * multiplier;
+  // calculate time between beeps
+  uint32_t tps = furi_kernel_get_tick_frequency();
+  double multiplier = 4.0d/metronome_state->note_length;
+  double bps = (double)metronome_state->bpm / 60;
+  return (uint32_t)(round(tps / bps) - ((BEEP_DELAY_MS/1000)*tps)) * multiplier;
 }
 
 static void update_timer(MetronomeState* metronome_state) {
@@ -144,144 +144,144 @@ static void decrease_bpm(MetronomeState* metronome_state, double amount) {
 }
 
 static void cycle_beats_per_bar(MetronomeState* metronome_state) {
-    metronome_state->beats_per_bar++;
-    if (metronome_state->beats_per_bar > metronome_state->note_length) {
-      metronome_state->beats_per_bar = 1;
-    }
+  metronome_state->beats_per_bar++;
+  if (metronome_state->beats_per_bar > metronome_state->note_length) {
+    metronome_state->beats_per_bar = 1;
+  }
 }
 
 static void cycle_note_length(MetronomeState* metronome_state) {
-    metronome_state->note_length *= 2;
-    if (metronome_state->note_length > 16) {
-      metronome_state->note_length = 2;
-      metronome_state->beats_per_bar = 1;
-    }
-    update_timer(metronome_state);
+  metronome_state->note_length *= 2;
+  if (metronome_state->note_length > 16) {
+    metronome_state->note_length = 2;
+    metronome_state->beats_per_bar = 1;
+  }
+  update_timer(metronome_state);
 }
 
 static void metronome_state_init(MetronomeState* const metronome_state) {
-    metronome_state->bpm = 120.0;
-    metronome_state->playing = false;
-    metronome_state->beats_per_bar = 4;
-    metronome_state->note_length = 4;
-    metronome_state->current_beat = 0;
-    metronome_state->notifications = furi_record_open(RECORD_NOTIFICATION);
+  metronome_state->bpm = 120.0;
+  metronome_state->playing = false;
+  metronome_state->beats_per_bar = 4;
+  metronome_state->note_length = 4;
+  metronome_state->current_beat = 0;
+  metronome_state->notifications = furi_record_open(RECORD_NOTIFICATION);
 }
 
 int32_t metronome_app() {
-    FuriMessageQueue* event_queue = furi_message_queue_alloc(8, sizeof(PluginEvent));
+  FuriMessageQueue* event_queue = furi_message_queue_alloc(8, sizeof(PluginEvent));
 
-    MetronomeState* metronome_state = malloc(sizeof(MetronomeState));
-    metronome_state_init(metronome_state);
+  MetronomeState* metronome_state = malloc(sizeof(MetronomeState));
+  metronome_state_init(metronome_state);
 
-    ValueMutex state_mutex;
-    if(!init_mutex(&state_mutex, metronome_state, sizeof(MetronomeState))) {
-        FURI_LOG_E("Metronome", "cannot create mutex\r\n");
-        free(metronome_state);
-        return 255;
-    }
+  ValueMutex state_mutex;
+  if(!init_mutex(&state_mutex, metronome_state, sizeof(MetronomeState))) {
+    FURI_LOG_E("Metronome", "cannot create mutex\r\n");
+    free(metronome_state);
+    return 255;
+  }
 
-    // Set system callbacks
-    ViewPort* view_port = view_port_alloc();
-    view_port_draw_callback_set(view_port, render_callback, &state_mutex);
-    view_port_input_callback_set(view_port, input_callback, event_queue);
-    metronome_state->timer = furi_timer_alloc(timer_callback, FuriTimerTypePeriodic, &state_mutex);
-
-    // Open GUI and register view_port
-    Gui* gui = furi_record_open("gui");
-    gui_add_view_port(gui, view_port, GuiLayerFullscreen);
-
-    PluginEvent event;
-    for(bool processing = true; processing;) {
-        FuriStatus event_status = furi_message_queue_get(event_queue, &event, 100);
-
-        MetronomeState* metronome_state = (MetronomeState*)acquire_mutex_block(&state_mutex);
-
-        if(event_status == FuriStatusOk) {
-            // press events
-            if(event.type == EventTypeKey) {
-                if(event.input.type == InputTypeShort) {
-                    switch(event.input.key) {
-                    case InputKeyUp:
-                        cycle_beats_per_bar(metronome_state);
-                        break;
-                    case InputKeyDown:
-                        break;
-                    case InputKeyRight:
-                        increase_bpm(metronome_state, BPM_STEP_SIZE_FINE);
-                        break;
-                    case InputKeyLeft:
-                        decrease_bpm(metronome_state, BPM_STEP_SIZE_FINE);
-                        break;
-                    case InputKeyOk:
-                        metronome_state->playing = !metronome_state->playing;
-                        if (metronome_state->playing) {
-                          furi_timer_start(metronome_state->timer, state_to_sleep_ticks(metronome_state));
-                        } else {
-                          furi_timer_stop(metronome_state->timer);
-                        }
-                        break;
-                    case InputKeyBack:
-                        processing = false;
-                        break;
-                    }
-                } else if (event.input.type == InputTypeLong) {
-                    switch(event.input.key) {
-                    case InputKeyUp:
-                        cycle_note_length(metronome_state);
-                        break;
-                    case InputKeyDown:
-                        break;
-                    case InputKeyRight:
-                        increase_bpm(metronome_state, BPM_STEP_SIZE_COARSE);
-                        break;
-                    case InputKeyLeft:
-                        decrease_bpm(metronome_state, BPM_STEP_SIZE_COARSE);
-                        break;
-                    case InputKeyOk:
-                        break;
-                    case InputKeyBack:
-                        processing = false;
-                        break;
-                    }
-                } else if (event.input.type == InputTypeRepeat) {
-                    switch(event.input.key) {
-                    case InputKeyUp:
-                        break;
-                    case InputKeyDown:
-                        break;
-                    case InputKeyRight:
-                        increase_bpm(metronome_state, BPM_STEP_SIZE_COARSE);
-                        break;
-                    case InputKeyLeft:
-                        decrease_bpm(metronome_state, BPM_STEP_SIZE_COARSE);
-                        break;
-                    case InputKeyOk:
-                        break;
-                    case InputKeyBack:
-                        processing = false;
-                        break;
-                    }
+  // Set system callbacks
+  ViewPort* view_port = view_port_alloc();
+  view_port_draw_callback_set(view_port, render_callback, &state_mutex);
+  view_port_input_callback_set(view_port, input_callback, event_queue);
+  metronome_state->timer = furi_timer_alloc(timer_callback, FuriTimerTypePeriodic, &state_mutex);
+
+  // Open GUI and register view_port
+  Gui* gui = furi_record_open("gui");
+  gui_add_view_port(gui, view_port, GuiLayerFullscreen);
+
+  PluginEvent event;
+  for(bool processing = true; processing;) {
+    FuriStatus event_status = furi_message_queue_get(event_queue, &event, 100);
+
+    MetronomeState* metronome_state = (MetronomeState*)acquire_mutex_block(&state_mutex);
+
+    if(event_status == FuriStatusOk) {
+      // press events
+      if(event.type == EventTypeKey) {
+        if(event.input.type == InputTypeShort) {
+          switch(event.input.key) {
+            case InputKeyUp:
+              cycle_beats_per_bar(metronome_state);
+              break;
+            case InputKeyDown:
+                break;
+            case InputKeyRight:
+                increase_bpm(metronome_state, BPM_STEP_SIZE_FINE);
+                break;
+            case InputKeyLeft:
+                decrease_bpm(metronome_state, BPM_STEP_SIZE_FINE);
+                break;
+            case InputKeyOk:
+                metronome_state->playing = !metronome_state->playing;
+                if (metronome_state->playing) {
+                  furi_timer_start(metronome_state->timer, state_to_sleep_ticks(metronome_state));
+                } else {
+                  furi_timer_stop(metronome_state->timer);
                 }
-            }
-        } else {
-            FURI_LOG_D("Metronome", "FuriMessageQueue: event timeout");
-            // event timeout
+                break;
+            case InputKeyBack:
+                processing = false;
+                break;
+          }
+        } else if (event.input.type == InputTypeLong) {
+          switch(event.input.key) {
+            case InputKeyUp:
+              cycle_note_length(metronome_state);
+              break;
+            case InputKeyDown:
+              break;
+            case InputKeyRight:
+              increase_bpm(metronome_state, BPM_STEP_SIZE_COARSE);
+              break;
+            case InputKeyLeft:
+              decrease_bpm(metronome_state, BPM_STEP_SIZE_COARSE);
+              break;
+            case InputKeyOk:
+              break;
+            case InputKeyBack:
+              processing = false;
+              break;
+          }
+        } else if (event.input.type == InputTypeRepeat) {
+          switch(event.input.key) {
+            case InputKeyUp:
+              break;
+            case InputKeyDown:
+              break;
+            case InputKeyRight:
+              increase_bpm(metronome_state, BPM_STEP_SIZE_COARSE);
+              break;
+            case InputKeyLeft:
+              decrease_bpm(metronome_state, BPM_STEP_SIZE_COARSE);
+              break;
+            case InputKeyOk:
+              break;
+            case InputKeyBack:
+              processing = false;
+              break;
+          }
         }
-
-        view_port_update(view_port);
-        release_mutex(&state_mutex, metronome_state);
+      }
+    } else {
+      FURI_LOG_D("Metronome", "FuriMessageQueue: event timeout");
+      // event timeout
     }
 
-    view_port_enabled_set(view_port, false);
-    gui_remove_view_port(gui, view_port);
-    furi_record_close("gui");
-    view_port_free(view_port);
-    furi_message_queue_free(event_queue);
-    delete_mutex(&state_mutex);
-    furi_timer_free(metronome_state->timer);
-    furi_record_close(RECORD_NOTIFICATION);
-    free(metronome_state);
+    view_port_update(view_port);
+    release_mutex(&state_mutex, metronome_state);
+  }
 
-    return 0;
+  view_port_enabled_set(view_port, false);
+  gui_remove_view_port(gui, view_port);
+  furi_record_close("gui");
+  view_port_free(view_port);
+  furi_message_queue_free(event_queue);
+  delete_mutex(&state_mutex);
+  furi_timer_free(metronome_state->timer);
+  furi_record_close(RECORD_NOTIFICATION);
+  free(metronome_state);
+
+  return 0;
 }