Schematic diagrams illustrating the configurations of two loops, the orange-colored broad lines of loop 1 and loop 2, during the mutual helicity a) and the self-helicity phases b). The red lines in a) show the magnetic field lines of loop 1, the blue lines show the field lines of loop 2. The green star denotes magnetic reconnection. The red-blue lines in b) indicate the reconnected lines,the dotted red lines show loops that are not detected in Si IV images. The red and blue arrows show the directions of the magnetic field lines.