Snapshots of the magnetic field evolution during the interval of one-third of the magnetic cycle P_cyc/3. The first (third) row represents a rotation period of 10 days with dipolar (quadrupolar) fields. The second (forth) row represents a rotation period of 25 days with dipolar (quadrupolar) fields. The strength of magnetic field is arbitrary in a linear regime, and is normalized to a maximum of 1 here. The region in red (blue) represents toroidal fields and inward (outward). The solid (dashed) lines represent the poloidal field clockwise (anticlockwise).