diff --git a/Demo_C/Demo/LED/LED.c b/Demo_C/Demo/LED/LED.c
index 11d3f27..67f2798 100644
--- a/Demo_C/Demo/LED/LED.c
+++ b/Demo_C/Demo/LED/LED.c
@@ -63,7 +63,7 @@ int PrgTic
 	{
 		prev_time = cur_time;
 		simple_rgb_test(p_ta_array);
-		prev_time = cur_time;
+		update_lights(p_ta_array);
 	}
     // if(cur_time-prev_time>=wait)
 	// {