diff --git a/mss.py b/mss.py
index d58de4d..fb727be 100644
--- a/mss.py
+++ b/mss.py
@@ -2,14 +2,12 @@ import time
 import threading
 from paho.mqtt import client as mqtt_client
 
-
 broker = 'broker.emqx.io'
 port = 1883
 
 pubtop = "/boxchat/tu"
 subtop = "/boxchat/tuan"
 
-
 client_id = f'python-mqtt-{10}' #connect to broker
 username = 'emqx'
 password = 'public'