diff --git a/MicroMDAEPiano.ino b/MicroMDAEPiano.ino
index e23eb2a..c2e93d8 100644
--- a/MicroMDAEPiano.ino
+++ b/MicroMDAEPiano.ino
@@ -230,9 +230,10 @@ void setup()
 
   Serial.println(F("<setup end>"));
 
-  menu.next_screen();
-  menu.update();
-
+  menu_system.next_screen();
+  menu_system.update();
+  menu_system.switch_focus();
+  
 #if defined (DEBUG) && defined (SHOW_CPU_LOAD_MSEC)
   show_cpu_and_mem_usage();
   cpu_mem_millis = 0;
diff --git a/UI.hpp b/UI.hpp
index c0e9094..b6f7e80 100644
--- a/UI.hpp
+++ b/UI.hpp
@@ -29,18 +29,42 @@
 
 extern LiquidCrystal_I2C lcd;
 
-LiquidMenu menu(lcd);
-
-const char text1[] PROGMEM = "MicroMDAEPiano";
-const char text2[] PROGMEM = "(c)parasiTstudio";
-
-//const char text1[] PROGMEM = "";
 
 // Welcome screen
-LiquidLine welcome_line1(1, 0, text1);
-LiquidLine welcome_line2(0, 1, text2);
+const char text00[] PROGMEM = "MicroMDAEPiano";
+const char text01[] PROGMEM = "(c)parasiTstudio";
+LiquidLine welcome_line1(1, 0, text00);
+LiquidLine welcome_line2(0, 1, text01);
 LiquidScreen welcome_screen(welcome_line1, welcome_line2);
 
+// Main menu
+const char text10[] PROGMEM = "Favorites      ";
+const char text11[] PROGMEM = "Sound          ";
+const char text12[] PROGMEM = "Store          ";
+const char text13[] PROGMEM = "Info           ";
+LiquidLine main_line1(0, 0, text10);
+LiquidLine main_line2(0, 1, text11);
+LiquidScreen main_screen(main_line1, main_line2);
+LiquidMenu main_menu(lcd,welcome_screen,main_screen,1);
+
+// Sound menu
+const char text20[] PROGMEM = "Decay    ";
+const char text21[] PROGMEM = "Release  ";
+const char text22[] PROGMEM = "Hardness ";
+const char text23[] PROGMEM = "Treble   ";
+LiquidLine sound_line1(0, 0, text20);
+LiquidLine sound_line2(0, 1, text21);
+LiquidLine sound_line3(0, 1, text22);
+LiquidLine sound_line4(0, 1, text23);
+LiquidScreen sound_screen(sound_line1, sound_line2, sound_line3, sound_line4);
+LiquidMenu sound_menu(lcd,sound_screen);
+
+// System menu
+LiquidSystem menu_system(main_menu, sound_menu);
+
+void callback_main_function() {
+  Serial.println(F("You called the main callback function."));
+}
 
 void menu_init(void)
 {
@@ -51,7 +75,9 @@ void menu_init(void)
   lcd.backlight();
   lcd.noAutoscroll();
 
-  menu.add_screen(welcome_screen);
-  menu.update();
+  main_line1.attach_function(1, callback_main_function);
+  
+  menu_system.update();
 }
+
 #endif