Create a musical composition incorporating the given motif following the designated alphabetical pattern.
X:1
L:1/8
M:3/4
K:Bb
['B2 G2']  
X:1
L:1/8
M:3/4
K:Bb
 Fz/d/ d2 cB | AG c3 B | Ag f2 fe | de =e2 f2 | B2 ABcG | BA _A3 G | FG_ABcd | fe B2 G2 | C3 E_Ac | 
 B2 G2 e2 | d3 F_Ac | B2 G2 E2 | d3 c_AF | E2 e2 F2 |]  