MOBILE APP with FLUTTER AND FIREBASE

Basically the application starts with the main page that I sent you, in it there is a button that says Iinicio, after starting, the application should show a button that says "Scan the QR code of your location" if you scan the QR code takes a reference point in a location, for example: Floor 1 => QR 1, Floor 2 =QR 2. After that you search for the room you want to look for, for example: Room 1, then it shows the route to the selected room, for example: Step 1 Go to the right next to the corridor. Step 2 Go straight ahead. Step 3 you are there. That would be the first part, on the same screen of the steps there should be a button that says "View room schedule", and there will be the room schedule.

I would like to have the code of the application to study it.