gaining attention

Gaining attention is a way or expression that is spoken so that other people will pay their attention to what we want to.

If you wan to gain attention of some people you can use this :
Attention, please
May I have your attention, please
Excuses me, look here
Listen to me, please
Waiter
I’m sorry, but
Wow really?

Example :
Dono : “excuse me, anybody here can give me some food?”
Adi : “listen to me guys, if we still noisy in class, we will get punishment.”