connections {
  from_room: "Main Area"
  to_room: "O Room"
  door { name: "O Puzzles" }
}
connections {
  from_room: "Main Area"
  to_room: "R Room"
  door { name: "R Puzzles" }
}
connections {
  from_room: "Main Area"
  to_room: "B Room"
  door { name: "B Puzzles" }
}
connections {
  from_room: "B Room"
  to_room: "Main Area"
  oneway: true
}