Teh Chorus (or Main Automation) is the main pattern that is often repeated throughout a Sparta remix.
Although there are several known versions of Chorus, the standard Chorus uses the following pattern:
11_11_111_1_1_11222_2_222_222_2_11_11_111_1_1_11222_2_222_222_2_
Freestyle
Any pattern that slightly deviates from this but still preserves rhythm and tempo is considered a freestyle. All freestyles can be seen here.