diff --git a/Group21_Lab06_Task2/main.c b/Group21_Lab06_Task2/main.c
index 3b000fc..b78af4e 100644
--- a/Group21_Lab06_Task2/main.c
+++ b/Group21_Lab06_Task2/main.c
@@ -1,3 +1,8 @@
 #include <stdint.h>
 #include <stdbool.h>
-#include "tm4c123gh6pm.h"
\ No newline at end of file
+#include "tm4c123gh6pm.h"
+// Global Variables
+volatile int duty = 50; // Initial duty cycle
+volatile bool buttonPressed = false; // Track button state
+volatile uint32_t pressDuration = 0; // Track how long the button is pressed
+const long int PWM_PERIOD = 1000000; // Period for 100kHz in microseconds (10ms)