I need help with script for a puzzle game!

I am building a game. there is building, It has many floors. every floor has a specific room (numbered, like 101, 207, 306 etc). in the game, the player has to find this specific room one by one. every time the player find a room a scene will load and there the player will have order to go to next room. then the main scene with the building will load and so on....

How can I do that?? can anyone help me with the scripts???

Please