diff --git a/APP/main.c b/APP/main.c
index 204c413..68e51c6 100644
--- a/APP/main.c
+++ b/APP/main.c
@@ -37,31 +37,39 @@ static void mf_init_all_subdevice_state() {
 static void time_set_led_state(uint8_t led_num, bool state) {
   switch (led_num) {
     case 0:
-      port_led0_set(state);
+      port_led0_set(false);
+      port_led1_set(false);
+      port_led2_set(false);
+      port_led3_set(false);
       break;
     case 1:
       port_led0_set(state);
-      port_led1_set(state);
+      port_led1_set(false);
+      port_led2_set(false);
+      port_led3_set(false);
       break;
     case 2:
       port_led0_set(state);
       port_led1_set(state);
-      port_led2_set(state);
+      port_led2_set(false);
+      port_led3_set(false);
       break;
     case 3:
       port_led0_set(state);
       port_led1_set(state);
       port_led2_set(state);
-      port_led3_set(state);
+      port_led3_set(false);
       break;
-
-    default:
-      printf("no more led\n");
+    case 4:
       port_led0_set(state);
       port_led1_set(state);
       port_led2_set(state);
       port_led3_set(state);
       break;
+
+    default:
+      printf("no more led\n");
+      break;
   }
 }
 
@@ -125,8 +133,8 @@ static void mf_process_timer_key(key_t *key) {
     this_device.configuration_mode = true;
   } else {
     this_device.time_led_num = this_device.time_led_num + 1;
-    if (this_device.time_led_num > 3) {
-      this_device.time_led_num = this_device.time_led_num - 3;
+    if (this_device.time_led_num > 4) {
+      this_device.time_led_num = this_device.time_led_num - 4;
     }
   }