Diagram:

The four UWB chips are placed in each of the four corners of the room, while the UWB sensor is positioned on the table at the entrance of the dining room. All the lights are connected to a single Arduino, with the wires discreetly hidden under the table. The lights are installed in a collective fashion at the room's corners, creating a warm and welcoming dining space. Additionally, the wall is adorned with beautiful window frames, further enhancing the room's ambiance.