(B^z)²/P_g (left), σ(B^z)²/P_g (middle), and angle ψ (right) of the magnetic field with the equatorial plane. At t = 32236 t_g, a bundle of ordered vertical magnetic field lines has begun to form, with its most energetic part threading the midplane at a distance of about 6 r_g from the black hole. The area of the flux tube footpoint expands over time as more equatorial magnetic field lines reconnect and form additional vertical magnetic lines, shown in the middle column.