Develop a musical composition that includes the supplied motif while following the designated alphabetical pattern.
X:1
L:1/8
M:2/2
K:Bb
['f(BAB) gBaB b(BAB) GBFB EBDB', 'z2 vf(BAB) g(BAB) (ga)ba (gf)ed (ed)ef (ge)cB']  
X:1
L:1/8
M:2/2
K:Bb
|: vBcde f(BAB) | gBaB b(BAB) | GBFB EBDB | C(cec) BAGF | Bcde f(BAB) | gBaB b(BAB) | GBFB EBDB | 
 C(ec)A B2 z2 :: vf(BAB) g(BAB) | (ga)ba (gf)ed | (ed)ef (ge)cB | (AB){d}cB (AF)GA | Bcde f(BAB) | 
 gBaB b(BAB) | GBFB EBDB | C(ec)A B2 z2 :|  