diff --git a/blink.c b/blink.c
index b44ceba..4b37dc7 100644
--- a/blink.c
+++ b/blink.c
@@ -1,35 +1,19 @@
 #include "ch32fun.h"
-#include <stdio.h>
 
-// use defines to make more meaningful names for our GPIO pins
-#define PIN_1 PD0
-#define PIN_K PD4
-#define PIN_BOB PD6
-#define PIN_KEVIN PC0
+#define LED_PIN PD6
 
-int main()
-{
-	SystemInit();
+int main() {
+    SystemInit();
 
-	// Enable GPIOs
-	funGpioInitAll();
-	
-	funPinMode( PIN_1,     GPIO_Speed_10MHz | GPIO_CNF_OUT_PP );
-	funPinMode( PIN_K,     GPIO_Speed_10MHz | GPIO_CNF_OUT_PP );
-	funPinMode( PIN_BOB,   GPIO_Speed_10MHz | GPIO_CNF_OUT_PP );
-	funPinMode( PIN_KEVIN, GPIO_Speed_10MHz | GPIO_CNF_OUT_PP );
+    // Enable GPIOs
+    funGpioInitAll();
 
-	while(1)
-	{
-		funDigitalWrite( PIN_1,     FUN_HIGH );
-		funDigitalWrite( PIN_K,     FUN_HIGH );
-		funDigitalWrite( PIN_BOB,   FUN_HIGH );
-		funDigitalWrite( PIN_KEVIN, FUN_HIGH );
-		Delay_Ms( 250 );
-		funDigitalWrite( PIN_1,     FUN_LOW );
-		funDigitalWrite( PIN_K,     FUN_LOW );
-		funDigitalWrite( PIN_BOB,   FUN_LOW );
-		funDigitalWrite( PIN_KEVIN, FUN_LOW );
-		Delay_Ms( 250 );
-	}
+    funPinMode(LED_PIN, GPIO_Speed_10MHz | GPIO_CNF_OUT_PP);
+
+    while (1) {
+        funDigitalWrite(LED_PIN, FUN_HIGH);
+        Delay_Ms(250);
+        funDigitalWrite(LED_PIN, FUN_LOW);
+        Delay_Ms(250);
+    }
 }