This addon is for the three Battlegrounds in wow classic.
It is one frame for each bg except "AV" that has two. The frames will load when you enter the battleground and you can drag the frame wherever you want.
When you click left mouse button it calls for help and when you press right mouse button it says base is safe. If you hold Shift + left mouse button it calls for "Big incoming" and only left mouse button calls for "A few incoming". Shift + right mouse button will say "All to" and it can be useful in AV when you want all come to Vandar/Drek.
Slash Commands are:/BGCallouts followed by show, hide or rwoff.
Ex. /BGCallouts show and /BGCallouts hide. Whith this function you can toggle frames for position them. You can set them on top of each other because only one of them will load in each battleground except AV that has two, one offense/defense for each faction.
You can make a macro like this to open the frames for postitioning them, left button opens the frames and right button close them: