How to divide the calligraphy of the Western Zhou Dynasty into stages?

For the convenience of narration, the calligraphy stage of the Western Zhou Dynasty is usually consistent with the historical stage of the Western Zhou Dynasty, which is divided into three stages: early, middle and late, namely:

Transition Period: Martial Arts, Success, Health and Zhao

Heyday: Mu, Gong, Yi and Xiao.

Decline: Yi, Li, (* * * and) Xuan, You.