style:format code
diff --git a/client.go b/client.go
index 84120c2..3aa9be2 100644
--- a/client.go
+++ b/client.go
@@ -58,8 +58,9 @@
 
 var (
 	num, max, times, interval int
-	maxDuraion int64
+	maxDuraion                int64
 )
+
 type Client interface {
 	EndPoint
 }