Build a bluetooth range alarm system for wallet

Hello dear forum members. I lost my wallet 2 weeks ago. So I would like to build an project about this. It will work like that:
-When I forget or drop it anywhere and out of bluetooth range, buzzer will ring. Probably ı will use my phone as a master. I have researched for 3 days, but haven't find a project like that. Please help me :smiley: