diff --git a/Core/Src/main.c b/Core/Src/main.c
index f94c1e6..053869d 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -18,6 +18,8 @@
 /* USER CODE END Header */
 /* Includes ------------------------------------------------------------------*/
 #include "main.h"
+#include "stm32f4xx_hal_gpio.h"
+#include "stm32f4xx_hal_tim.h"
 
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
@@ -94,7 +96,7 @@ int main(void)
   /* Initialize interrupts */
   MX_NVIC_Init();
   /* USER CODE BEGIN 2 */
-
+  HAL_TIM_Base_Start_IT(&htim2);
   /* USER CODE END 2 */
 
   /* Infinite loop */
@@ -248,7 +250,10 @@ static void MX_GPIO_Init(void)
 }
 
 /* USER CODE BEGIN 4 */
-
+void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *h) {
+	HAL_GPIO_TogglePin(LED_RED_GPIO_Port, LED_RED_Pin);
+	return;
+}
 /* USER CODE END 4 */
 
 /**