diff --git a/main.c b/main.c
index 9ec13b9..97869be 100644
--- a/main.c
+++ b/main.c
@@ -23,18 +23,34 @@ void GPIO_PORT_F_init(void)
     GPIO_PORTF_IEV_R = 0x00;                 // Falling edge event
     GPIO_PORTF_IM_R  |= 0x11;                // Unmask interrupts for PF0 and PF4
 }
-void systick_setting(void)                      // SYSTICK SETUP FUNCTION
+void systick_setting(void)                   // SYSTICK SETUP FUNCTION
 {
-    STRELOAD = SYSTICK_RELOAD_VALUE(1000);     // RELOAD VALUE FOR 1ms
-    STCTRL |= (1 << 0) | (1 << 2);              // Enable SysTick with system clock
-    STCURRENT = 0;                               // Clear current value
+    STRELOAD = SYSTICK_RELOAD_VALUE(1000);   // RELOAD VALUE FOR 1ms
+    STCTRL |= (1 << 0) | (1 << 2);           // Enable SysTick with system clock
+    STCURRENT = 0;                           // Clear current value
 }
 
-void delay(int us)                              //DEFINING DELAY FUNCTION
+void delay(int us)                           //DEFINING DELAY FUNCTION
 {
-    STRELOAD = SYSTICK_RELOAD_VALUE(us);        // RELOAD VALUE FOR REQUIRED DELAY
-    STCURRENT = 0;                               // Clear STCURRENT
-    STCTRL |= (1 << 0) | (1 << 2);              // Enable SysTick
-    while ((STCTRL & (1 << 16)) == 0);          // Wait until flag is set
-    STCTRL &= 0x0;                               // Stop the timer
+    STRELOAD = SYSTICK_RELOAD_VALUE(us);     // RELOAD VALUE FOR REQUIRED DELAY
+    STCURRENT = 0;                           // Clear STCURRENT
+    STCTRL |= (1 << 0) | (1 << 2);           // Enable SysTick
+    while ((STCTRL & (1 << 16)) == 0);       // Wait until flag is set
+    STCTRL &= 0x0;                           // Stop the timer
+}
+
+void GPIOF_interruptHandler(void)            // Interrupt handler for GPIO Port F
+{
+    delay(200000);                           // DEBOUNCE DELAY
+    if (GPIO_PORTF_RIS_R & 0x10)             // CHECK IF SWITCH 1 CAUSED INTERRUPT
+    {
+        GPIO_PORTF_DATA_R ^= 0x02;           // TOGGLE RED LED
+        GPIO_PORTF_ICR_R = 0x10;             // CLEAR INTERRUPT FLAG FOR SWITCH 1
+    }
+
+    if (GPIO_PORTF_RIS_R & 0x01)             // CHECK IF SWITCH 2 CAUSED INTERRUPT
+    {
+        GPIO_PORTF_DATA_R ^= 0x02;           // TOGGLE RED LED
+        GPIO_PORTF_ICR_R = 0x01;             // CLEAR INTERRUPT FLAG FOR SWITCH 1
+    }
 }