diff --git a/Production/Firmware/nos_pico.uf2 b/Production/Firmware/nos_pico.uf2
index c9c50b0..df88018 100644
Binary files a/Production/Firmware/nos_pico.uf2 and b/Production/Firmware/nos_pico.uf2 differ
diff --git a/firmware/src/CMakeLists.txt b/firmware/src/CMakeLists.txt
index c5d8b6c..a29eb9a 100644
--- a/firmware/src/CMakeLists.txt
+++ b/firmware/src/CMakeLists.txt
@@ -1,7 +1,7 @@
 function(make_firmware board board_def)
     pico_sdk_init()
     add_executable(${board}
-        main.c light.c hammer.c button.c savedata.c config.c commands.c cli.c
+        main.c light.c hammer.c button.c savedata.c setup.c config.c commands.c cli.c
         usb_descriptors.c)
     target_compile_definitions(${board} PUBLIC ${board_def})
     pico_enable_stdio_usb(${board} 1)
diff --git a/firmware/src/config.h b/firmware/src/config.h
index cf27e63..0b9e118 100644
--- a/firmware/src/config.h
+++ b/firmware/src/config.h
@@ -29,6 +29,12 @@ typedef struct __attribute__((packed)) {
         bool midi : 1;
         uint8_t reserved[15];
     } hid;
+    struct {
+        uint8_t b1;
+        uint8_t b2;
+        uint8_t b3;
+        uint8_t b4;
+    } buttons;
 } nos_cfg_t;
 
 typedef struct {
diff --git a/firmware/src/light.c b/firmware/src/light.c
index 85d8cf0..23af179 100644
--- a/firmware/src/light.c
+++ b/firmware/src/light.c
@@ -156,4 +156,22 @@ void light_set_logo(uint32_t color, bool hid)
     for (int i = 0; i < count_of(buf_logo); i++) {
         buf_logo[i] = apply_level(color, nos_cfg->light.level_logo);
     }
-}
\ No newline at end of file
+}
+
+
+void light_set_subkey(uint8_t index, bool upper, uint32_t color)
+{
+    if (index >= 28) {
+        return;
+    }
+    uint32_t new_color = apply_level(color, nos_cfg->light.level_key);
+    buf_key[index * 2 + (upper ? 0 : 1)] = new_color;
+}
+
+void light_set_sublogo(uint8_t index, uint32_t color)
+{
+    if (index >= 6) {
+        return;
+    }
+    buf_logo[index] = apply_level(color, nos_cfg->light.level_logo);
+}
diff --git a/firmware/src/light.h b/firmware/src/light.h
index 135d842..9531b57 100644
--- a/firmware/src/light.h
+++ b/firmware/src/light.h
@@ -21,5 +21,7 @@ uint32_t rgb32_from_hsv(uint8_t h, uint8_t s, uint8_t v);
 void light_set_key(uint8_t index, uint32_t color, bool hid);
 void light_set_logo(uint32_t color, bool hid);
 
+void light_set_subkey(uint8_t index, bool up_down, uint32_t color);
+void light_set_sublogo(uint8_t index, uint32_t color);
 
 #endif
diff --git a/firmware/src/main.c b/firmware/src/main.c
index 7803d63..3a95dac 100644
--- a/firmware/src/main.c
+++ b/firmware/src/main.c
@@ -25,6 +25,7 @@
 #include "board_defs.h"
 
 #include "savedata.h"
+#include "setup.h"
 #include "config.h"
 #include "cli.h"
 #include "commands.h"
@@ -65,7 +66,9 @@ static void core1_loop()
     sleep_ms(500);
     while (1) {
         if (mutex_try_enter(&core1_io_lock, NULL)) {
-            run_lights();
+            if (!setup_is_active()) {
+                run_lights();
+            }
             light_update();
             mutex_exit(&core1_io_lock);
         }
@@ -146,6 +149,7 @@ static void core0_loop()
         proc_midi();
         button_update();
         hid_update();
+        setup_update();
 
         cli_fps_count(0);
         sleep_until(next_frame);
diff --git a/firmware/src/setup.c b/firmware/src/setup.c
new file mode 100644
index 0000000..0591219
--- /dev/null
+++ b/firmware/src/setup.c
@@ -0,0 +1,247 @@
+/*
+ * Live Setup
+ * WHowe <github.com/whowechina>
+ * 
+ */
+
+#include "setup.h"
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "hardware/timer.h"
+
+#include "config.h"
+#include "savedata.h"
+#include "hammer.h"
+#include "light.h"
+#include "button.h"
+
+enum {
+    SETUP_NONE = 0,
+    SETUP_LEVEL_KEY,
+    SETUP_LEVEL_LOGO,
+    SETUP_LIGHT_MODE,
+    SETUP_BUTTON,
+    SETUP_HID,
+    SETUP_MAX,
+};
+
+#define MODE_COUNT (SETUP_MAX - 1)
+
+static nos_cfg_t cfg_bak;
+static uint8_t level_key;
+static uint8_t level_logo;
+
+static int setup_mode = SETUP_NONE;
+static uint16_t last_pressed;
+static uint16_t pressed;
+static uint16_t just_pressed;
+static bool temp_locked = false;
+
+static uint8_t fast_breath;
+static uint8_t slow_breath;
+
+#define B1_PREV 1
+#define B2_NEXT 2
+#define B3_NO 4
+#define B4_YES 8
+
+static void read_button()
+{
+    last_pressed = pressed;
+    pressed = button_read();
+    just_pressed = pressed & ~last_pressed;
+}
+
+static void run_mode_none()
+{
+    if (pressed == (B1_PREV | B2_NEXT | B3_NO | B4_YES)) {
+        cfg_bak.light = nos_cfg->light;
+        cfg_bak.hid = nos_cfg->hid;
+        level_key = nos_cfg->light.level_key;
+        level_logo = nos_cfg->light.level_logo;
+        nos_cfg->light.level_key = 240;
+        nos_cfg->light.level_logo = 240;
+        setup_mode = SETUP_LEVEL_KEY;
+        temp_locked = true;
+    }
+}
+
+static void run_nav_lights()
+{
+    for (int i = 0; i < MODE_COUNT; i++) {
+        uint8_t h = (i * 255) / MODE_COUNT;
+        uint8_t s = 30;
+        uint8_t v = 16;
+
+        if (setup_mode == i + 1) {
+            v = slow_breath;
+            s = 255;
+        }
+
+        uint32_t color = rgb32_from_hsv(h, s, v);
+        light_set_sublogo(i, color);
+    }
+
+    for (int i = MODE_COUNT; i < 6; i++) {
+        light_set_sublogo(i, 0);
+    }
+}
+
+static void run_navigation()
+{
+    if (temp_locked && pressed) {
+        return;
+    }
+    temp_locked = false;
+
+    if (just_pressed & B1_PREV) {
+        setup_mode = (setup_mode + MODE_COUNT - 2) % MODE_COUNT + 1;
+    }
+    if (just_pressed & B2_NEXT) {
+        setup_mode = setup_mode % MODE_COUNT + 1;
+    }
+    if (just_pressed & B3_NO) {
+        setup_mode = SETUP_NONE;
+        nos_cfg->light = cfg_bak.light;
+        nos_cfg->hid = cfg_bak.hid;
+        return;
+    }
+    if (just_pressed & B4_YES) {
+        setup_mode = SETUP_NONE;
+        nos_cfg->light.level_key = level_key;
+        nos_cfg->light.level_logo = level_logo;
+        savedata_save(true);
+        return;
+    }
+
+    run_nav_lights();
+}
+
+
+// Curve: y = k * x ^ 1.9
+static const uint8_t level_map[28] = {
+    0, 2, 4, 7, 10, 14, 18, 24, 30, 36, 43, 51, 59, 68, 78, 88,
+    99, 110, 122, 135, 148, 161, 175, 190, 206, 222, 238, 255
+};
+
+static void run_level(bool key_or_logo)
+{
+    for (int i = 0; i < 28; i++) {
+        uint8_t step = level_map[i];
+        if (hammer_pressed(i)) {
+            if (key_or_logo) {
+                level_key = step;
+            } else {
+                level_logo = step;
+            }
+            break;
+        }
+    }
+
+    uint8_t level = key_or_logo ? level_key : level_logo;
+
+    for (int i = 0; i < 28; i++) {
+        uint8_t step = level_map[i];
+        uint32_t color = 0;
+        if (level >= step) {
+            color = rgb32_from_hsv(key_or_logo ? 0 : 51, 120, step);        
+        }
+        light_set_subkey(i, false, color);
+        light_set_subkey(i, true, color);
+    }
+}
+
+static void clear_key_lights()
+{
+    for (int i = 0; i < 28; i++) {
+        light_set_subkey(i, false, 0);
+        light_set_subkey(i, true, 0);
+    }
+}
+
+static void run_light_mode()
+{
+    for (int i = 0; i < 4; i++) {
+        if (hammer_pressed(i * 2) || hammer_pressed(i * 2 + 1)) {
+            nos_cfg->light.type = i;
+            break;
+        }
+    }
+
+    for (int i = 0; i < 4; i++) {
+        static const uint32_t colors[4] = {
+            0x202020, 0x401010, 0x104010, 0x101040
+        };
+        light_set_subkey(i * 2, false, colors[i]);
+        light_set_subkey(i * 2 + 1, false, colors[i]);
+
+        uint32_t color = 0;
+        if (i == nos_cfg->light.type) {
+            color = rgb32_from_hsv(102, 255, slow_breath);
+        }
+        light_set_subkey(i * 2, true, color);
+        light_set_subkey(i * 2 + 1, true, color);
+    }
+
+    for (int i = 8; i < 28; i++) {
+        light_set_subkey(i, false, 0);
+        light_set_subkey(i, true, 0);
+    }
+}
+
+static void run_button()
+{
+    clear_key_lights();
+}
+
+static void run_hid()
+{
+    clear_key_lights();
+}
+
+static void run_mode()
+{
+    if (setup_mode == SETUP_NONE) {
+        run_mode_none();
+    } else if (setup_mode == SETUP_LEVEL_KEY) {
+        run_level(true);
+    } else if (setup_mode == SETUP_LEVEL_LOGO) {
+        run_level(false);
+    } else if (setup_mode == SETUP_LIGHT_MODE) {
+        run_light_mode();
+    } else if (setup_mode == SETUP_BUTTON) {
+        run_button();
+    } else if (setup_mode == SETUP_HID) {
+        run_hid();
+    }
+}
+
+static const uint8_t breath_level[] = {
+    0, 0, 1, 2, 4, 6, 9, 12, 16, 21, 26, 33, 40, 47, 55,
+    65, 74, 85, 96, 109, 122, 135, 150, 165, 182, 
+    182, 165, 150, 135, 122, 109, 96, 85, 74, 65, 55, 47,
+    40, 33, 26, 21, 16, 12, 9, 6, 4, 2, 1, 0, 0
+};
+
+static void update_masks()
+{
+    slow_breath = breath_level[(time_us_32() / 4777) % count_of(breath_level)];
+    fast_breath = breath_level[(time_us_32() / 3777) % count_of(breath_level)];
+}
+
+void setup_update()
+{
+    read_button();
+    run_mode();
+    if (setup_mode != SETUP_NONE) {
+        run_navigation();
+    }
+    update_masks();
+}
+
+bool setup_is_active()
+{
+    return setup_mode != SETUP_NONE;
+}
diff --git a/firmware/src/setup.h b/firmware/src/setup.h
new file mode 100644
index 0000000..ee86c3d
--- /dev/null
+++ b/firmware/src/setup.h
@@ -0,0 +1,15 @@
+/*
+ * Live Setup
+ * WHowe <github.com/whowechina>
+ */
+
+#ifndef SETUP_H
+#define SETUP_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+void setup_update();
+bool setup_is_active();
+
+#endif