The electric field of light at the center of a one-dimensional mirrored multilayer structure consisting of two consecutive dielectric media A and B in the unit cell, namely AB mirrored multilayer structure, is well-known to rise exponentially by increasing the repetition number of the unit cell, in which the refractive index of A is larger than that of B. What happens if we now consider more than two dielectric media in the unit cell? In this study, we show that the electric field enhancement for an odd number of dielectric media in the unit cell, e.g. ABC structure, oscillates between zero and a certain finite value when increasing the repetition number. Meanwhile, for an even number of dielectric media in the unit cell, e.g. ABCD structure, the electric field at the center of the multilayer structure can be enhanced significantly when increasing the repetition number by simply tweaking the refractive index ratios of the dielectric media in the unit cell. Furthermore, the even number of dielectric media in the unit cell may fine-tune the electric field enhancement with better precision to obtain the desired value for photonic applications.