diff --git a/main/light.c b/main/light.c
index be0e453..660f380 100644
--- a/main/light.c
+++ b/main/light.c
@@ -210,22 +210,6 @@ void light_for_init() {
   ESP_LOGI(LIGHT_TAG, "light_for_init");
   ESP_ERROR_CHECK(light_led_strip->clear(light_led_strip, 100));
 
-  uint32_t red = 0, green = 0, blue = 0;
-  int8_t i = 0;
-
-  do {
-    for (; i < 50; i++) {
-      for (int j = 0; j < STRIP_LED_NUMBER; j++) {
-        led_strip_hsv2rgb(0, 0, i, &red, &green, &blue);
-        ESP_ERROR_CHECK(
-            light_led_strip->set_pixel(light_led_strip, j, red, green, blue));
-      }
-      ESP_ERROR_CHECK(light_led_strip->refresh(light_led_strip, 100));
-      vTaskDelay(pdMS_TO_TICKS(20));
-    }
-    vTaskDelay(pdMS_TO_TICKS(100));
-  } while (light_mode == light_mode_init);
-
   nvs_handle local_nvs_handle;
   esp_err_t err = nvs_open("storage", NVS_READWRITE, &local_nvs_handle);
   if (err != ESP_OK) {
@@ -251,6 +235,28 @@ void light_for_init() {
 
   nvs_close(local_nvs_handle);
 
+  float r_f = (float)r / 255.0;
+  float g_f = (float)g / 255.0;
+  float b_f = (float)b / 255.0;
+
+  uint8_t init_r, init_g, init_b;
+
+  do {
+    for (uint8_t i = 0; i < 50; i++) {
+      init_r = (uint8_t)(r_f * (float)i);
+      init_g = (uint8_t)(g_f * (float)i);
+      init_b = (uint8_t)(b_f * (float)i);
+
+      for (int j = 0; j < STRIP_LED_NUMBER; j++) {
+        ESP_ERROR_CHECK(light_led_strip->set_pixel(light_led_strip, j, init_r,
+                                                   init_g, init_b));
+      }
+      ESP_ERROR_CHECK(light_led_strip->refresh(light_led_strip, 100));
+      vTaskDelay(pdMS_TO_TICKS(20));
+    }
+    vTaskDelay(pdMS_TO_TICKS(100));
+  } while (light_mode == light_mode_init);
+
   led_strip_set_color_calibration((float)r / 255.0, (float)g / 255.0,
                                   (float)b / 255.0);
 }
@@ -354,6 +360,8 @@ void light_init_strip() {
 void light_play_colors(uint16_t len, uint8_t *buffer) {
   light_mode = light_mode_desktop_sending_colors;
 
+  uint16_t black_count = 0;  // count of black pixels. r/g/b <= 10
+
   for (uint16_t led_index = 0, buffer_cursor = 0;
        led_index < STRIP_LED_NUMBER && buffer_cursor < len;
        led_index++, buffer_cursor += 3) {
@@ -366,10 +374,27 @@ void light_play_colors(uint16_t len, uint8_t *buffer) {
             b = (uint8_t)((float)buffer[buffer_cursor + 2] *
                           display_ambient_light_brightness *
                           led_strip_blue_calibration);
+    if (r <= 10 && g <= 10 && b <= 10) {
+      black_count++;
+    }
     ESP_ERROR_CHECK(
         light_led_strip->set_pixel(light_led_strip, led_index, r, g, b));
   }
-  ESP_ERROR_CHECK(light_led_strip->refresh(light_led_strip, 100));
+
+  if (black_count > STRIP_LED_NUMBER / 4 * 3) {
+    ESP_ERROR_CHECK(light_led_strip->clear(light_led_strip, 50));
+    uint8_t r = (uint8_t)((float)100 * display_ambient_light_brightness *
+                          led_strip_red_calibration),
+            g = (uint8_t)((float)100 * display_ambient_light_brightness *
+                          led_strip_green_calibration),
+            b = (uint8_t)((float)100 * display_ambient_light_brightness *
+                          led_strip_blue_calibration);
+    for (uint16_t led_index = 0; led_index < STRIP_LED_NUMBER; led_index++) {
+      ESP_ERROR_CHECK(
+          light_led_strip->set_pixel(light_led_strip, led_index, r, g, b));
+    }
+  }
+  ESP_ERROR_CHECK(light_led_strip->refresh(light_led_strip, 50));
   vTaskDelay(pdMS_TO_TICKS(10));
 }