diff --git a/Demo_C/Demo/LED/LED.c b/Demo_C/Demo/LED/LED.c
index ada0e45..45b8888 100644
--- a/Demo_C/Demo/LED/LED.c
+++ b/Demo_C/Demo/LED/LED.c
@@ -61,7 +61,9 @@ int PrgTic
     cur_time = p_ta->hook_table.GetSystemTime(TIMER_UNIT_MILLISECONDS);
     if(cur_time-prev_time>=wait)
 	{
+		prev_time = cur_time;
 		simple_rgb_test(p_ta_array);
+		prev_time = cur_time;
 	}
     // if(cur_time-prev_time>=wait)
 	// {