No Notification Receive using Arduino UNO Serial USB

I already read and follow those step in this both link Keep your void loop() clean - Blynk Documentation and Events, Notifications and the use of "Flag" variables, but still not working

Here’s my notification tab

my blynk event tab is ok and also my notification tab, the problem sir is I don’t really know where line should I put those codes in my project :frowning: