diff --git a/main.c b/main.c
index 74bc853..7b09ea4 100644
--- a/main.c
+++ b/main.c
@@ -24,4 +24,13 @@ void delay(int us)
     STCTRL |= ENABLE | CLKINT;                  // Enable SysTick
     while ((STCTRL & (1 << 16)) == 0);          // Wait until flag is set
     STCTRL &= ~ENABLE;                          // Stop the timer
+}
+
+int main(void) 
+{
+    systick_setting(); // SysTick setup
+    while (1) 
+    {
+      
+    }
 }
\ No newline at end of file