diff --git a/fpga/xc7z010/led.v b/fpga/xc7z010/led.v
index b844b07..be1c05c 100644
--- a/fpga/xc7z010/led.v
+++ b/fpga/xc7z010/led.v
@@ -28,7 +28,7 @@ end
 // 100的时候，占空比最大，这个时候直接完全输出低电平，led等熄灭
 always@(posedge myclk) begin
 	if(flag == 0) begin // 占空比递增
-		if(current_cycle < (CYCLE_NUMBER/2))
+		if(current_cycle < (CYCLE_NUMBER/10))
 			current_cycle <= current_cycle + 1'b1;
 		else
 			flag <= ~flag;