Mix of various pattern most of them procedurally generated using geometric node and this one https://skfb.ly/6ZDTw manually designed years ago. The 3 main patterns use a multiline style of tubes, the two side patterns including both square and diamond layouts with tubes thickness varying according to opposite gradient values (going away from the center the square layout golden tubes fatten while diamond layout marble tubes shrink). I also used my newest nodgroup to procedurally generate not only rotationally symmetric but also mirror symmetric myriapod frames in the style of this previous manually designed model https://skfb.ly/pwAGA