diff --git a/src/c/myfirstproject.c b/src/c/myfirstproject.c
new file mode 100644
index 0000000..429f012
--- /dev/null
+++ b/src/c/myfirstproject.c
@@ -0,0 +1,121 @@
+#include <pebble.h>
+
+/* State */
+
+static int current_number = 1;
+
+/* Settings */
+
+static void prv_update_ui();
+
+#define SETTINGS_KEY 1
+
+typedef struct ClaySettings {
+  int UPPER_BOUND;
+} ClaySettings;
+static ClaySettings settings;
+
+static void prv_default_settings() {
+  settings.UPPER_BOUND = 6;
+}
+
+static void prv_load_settings() {
+  prv_default_settings();
+  persist_read_data(SETTINGS_KEY, &settings, sizeof(settings));
+  current_number = settings.UPPER_BOUND;
+}
+
+static void prv_save_settings() {
+  persist_write_data(SETTINGS_KEY, &settings, sizeof(settings));
+  current_number = settings.UPPER_BOUND;
+}
+
+static void prv_inbox_received_handler(DictionaryIterator *iter, void *context) {
+  Tuple *upper_bound_t = dict_find(iter, MESSAGE_KEY_UPPER_BOUND);
+  if (upper_bound_t) {
+    settings.UPPER_BOUND = upper_bound_t->value->int32;
+  }
+
+  prv_save_settings();
+  prv_update_ui();
+}
+
+/* UI */
+
+static Window *s_window;
+static TextLayer *s_text_layer;
+
+static void prv_update_ui() {
+  static char string_buffer[7];
+  snprintf(string_buffer, sizeof(string_buffer), "%u", current_number);
+  text_layer_set_text(s_text_layer, string_buffer);
+}
+
+static void prv_window_load(Window *window) {
+  Layer *window_layer = window_get_root_layer(window);
+  GRect bounds = layer_get_bounds(window_layer);
+
+  int text_h = 32 + 10;
+  GRect text_bounds = GRect(0, (bounds.size.h - text_h) / 2, bounds.size.w, text_h);
+  GFont text_font = fonts_get_system_font(FONT_KEY_LECO_32_BOLD_NUMBERS);
+
+  s_text_layer = text_layer_create(text_bounds);
+
+  text_layer_set_background_color(s_text_layer, GColorBlack);
+  text_layer_set_font(s_text_layer, text_font);
+  text_layer_set_text_color(s_text_layer, GColorWhite);
+  text_layer_set_text_alignment(s_text_layer, GTextAlignmentCenter);
+
+  layer_add_child(window_layer, text_layer_get_layer(s_text_layer));
+  prv_update_ui();
+}
+
+static void prv_window_unload(Window *window) {
+  text_layer_destroy(s_text_layer);
+}
+
+/* Input */
+
+static void prv_click_handler(ClickRecognizerRef recognizer, void *context) {
+  current_number = 1 + rand() % settings.UPPER_BOUND;
+  prv_update_ui();
+}
+
+static void prv_click_config_provider(void *context) {
+  window_single_click_subscribe(BUTTON_ID_UP, prv_click_handler);
+  window_single_click_subscribe(BUTTON_ID_DOWN, prv_click_handler);
+  window_single_click_subscribe(BUTTON_ID_SELECT, prv_click_handler);
+}
+
+/* Lifecycle */
+
+static void prv_init(void) {
+  prv_load_settings();
+
+  app_message_register_inbox_received(prv_inbox_received_handler);
+  app_message_open(128, 128);
+
+  s_window = window_create();
+  window_set_background_color(s_window, GColorBlack);
+  window_set_click_config_provider(s_window, prv_click_config_provider);
+  window_set_window_handlers(s_window, (WindowHandlers) {
+    .load = prv_window_load,
+    .unload = prv_window_unload,
+  });
+  const bool animated = true;
+  window_stack_push(s_window, animated);
+}
+
+static void prv_deinit(void) {
+  prv_save_settings();
+  window_destroy(s_window);
+}
+
+int main(void) {
+  prv_init();
+
+  APP_LOG(APP_LOG_LEVEL_DEBUG, "Done initializing, pushed window: %p", s_window);
+
+  app_event_loop();
+  prv_deinit();
+}