Android app with many Beacons

I have a project to create App. This is my situation:
You have 2 Beacons (Green and Blue). You have also 2 doors (Green and Blue). You put Green Beacon to Green Doors and Blue Beacon to Blue Doors. The App have to give notification (“I’m a green doors”/ “I’m a blue doors”) whenever I’m close to Green or Blue doors.
I tried to make App using some tutorials, but it only works for 1 beacon.
Does anyone has any ideas how to make it for more than 1 beacon?

Thanks for any help and greeting