Donut house: ring home 18 m around a round courtyard

I've drawn the ring-shaped house in `plan.dxf` and checked the preview against your brief; everything you asked for is there. The main thing to know is that the rooms are only reached through each other, so the bathroom is the route between bedroom 2 and the entrance. - Building: 18 m outer and 8 m inner diameter, so the ring is 5 m deep. The library can't draw true curves, so each circle is made of 28 straight segments. - Rooms, running anticlockwise from the south entrance passage (each area is tagged on the plan and listed in a room schedule beside it): - entrance passage 13.9 m² - study 27.8 m² - living room 41.6 m² - kitchen-dining 34.7 m² - bedroom 1 27.8 m² - bedroom 2 27.8 m² - bathroom 20.8 m² - Total: about 194 m² net. - Walls: 0.15 m outer wall with windows, 0.12 m walls between rooms, and a fully glazed wall facing the courtyard. - Openings: a 1.0 m front door in the outer wall, and the entrance passage also opens straight onto the courtyard. - Courtyard: open, with a tree in the middle. - Fixtures and furniture: kitchen line, dining table, sofa group, double beds with nightstands, desk, and a bathroom with tub, shower, WC and basin. - Annotation: grid lines A–C and 1–3, overall and per-bay dimensions along the south side and the overall dimension on the west side, floor level marker, north arrow, title, room schedule and legend. - Layers: A-WALL, A-WALL-PATT, A-GLAZ, A-DOOR, A-FURN, A-FLOR-FIXT, A-PLNT, A-GRID, A-ANNO-DIMS, A-ANNO-TEXT, A-ANNO-SYMB. Assumptions I took: - North is up and the entrance faces south. - There is no corridor, so the rooms connect through 0.85 m doors in the walls between them. - The room sizes come from splitting the ring into equal segments, with the living room largest and the bathroom smallest. - The 1:100 scale is my choice.