diff --git a/Core/App/app.cpp b/Core/App/app.cpp
index 3346448..9240eac 100644
--- a/Core/App/app.cpp
+++ b/Core/App/app.cpp
@@ -1,24 +1,36 @@
 #include "Helper/delay_helper.h"
 #include "stm32h563xx.h"
 
-#include "Common/serial_port.hpp"
-#include "Helper/gpio_helper.hpp"
 #include "Center/common_center.hpp"
+#include "Helper/gpio_helper.hpp"
+#include "Helper/delay_helper.h"
 
+void TerminateHandler() {
+    auto led = GpioHelper::GpioInit(GPIOB, GPIO_PIN_0, GPIO_MODE_OUTPUT_PP, GPIO_NOPULL, GPIO_PIN_SET);
+    while (true) {
+        led.Toggle();
+        DelayS(1);
+    }
+}
 
 void Setup() {
     GpioHelper::EnableAllGpioPeripheral();
     DelaySetup();
     auto ultrasonic = CommonCenter::GetUltrasonic();
-    auto dfPlayer  = CommonCenter::GetDfPlayer();
-    auto canMv     = CommonCenter::GetCanMv();
+    auto dfPlayer   = CommonCenter::GetDfPlayer();
+    auto canMv      = CommonCenter::GetCanMv();
 }
 
 extern "C" void AppStart() {
     Setup();
-    auto gpio = GpioHelper::GpioInit(GPIOB, GPIO_PIN_0, GPIO_MODE_OUTPUT_PP, GPIO_NOPULL, GPIO_PIN_SET);
+    auto ultrasonic = CommonCenter::GetUltrasonic();
+    auto dfPlayer   = CommonCenter::GetDfPlayer();
+    auto canMv      = CommonCenter::GetCanMv();
     while (true) {
-        gpio.Toggle();
-        DelayS(1);
+        // Example usage of the classes
+        ultrasonic.GetDistance();
+        dfPlayer.PlayTrack(1);
+
+        DelayMs(1000); // Delay for 1 second
     }
 }