diff --git a/Group21_Lab06_Task1/main.c b/Group21_Lab06_Task1/main.c
index e6e041e..90792b7 100644
--- a/Group21_Lab06_Task1/main.c
+++ b/Group21_Lab06_Task1/main.c
@@ -67,3 +67,24 @@ void SystickHandler(void)
     }
 }
 
+void GPIOF_interruptHandler(void)
+{
+    delay(200000);                        // Debounce delay
+    if (GPIO_PORTF_RIS_R & 0x01)          // Check if PF0 caused the interrupt (Switch 1)
+    {
+        duty += 5;                        // Increase duty cycle
+        if (duty > 100) duty = 100;       // Limit to max 100%
+        GPIO_PORTF_ICR_R = 0x01;          // Clear interrupt flag for PF0
+       // systick_setting();
+    }
+
+    if (GPIO_PORTF_RIS_R & 0x10)
+    {                                 // Check if PF0 caused the interrupt (Switch 1)
+        duty -= 5;                    // Increase duty cycle
+        if (duty < 0) duty = 0;       // Limit to max 100%
+        GPIO_PORTF_ICR_R = 0x10;      // Clear interrupt flag for PF0
+            //systick_setting();
+     }
+    systick_setting();
+}
+