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
['B2 (BA) BFDF Bcde fgab', 'B,DFB dBFD EGcd ecAc Bbab']  
X:1
L:1/8
M:2/2
K:Bb
 F2 | B2 (BA) BFDF | Bcde fgab | BFcF dFeF | dcBd cBAc | B2 (BA) BFDF | Bcde fgab | 
{g} f=efg f_ecA | Bbfd B2 || (FD) | B,DFB dBFD | EGcd ecAc | Bbab fdBd | (3cdc (3BAG (3FGF (3EDC | 
 B,DFB dBFD | EGcd ecAc | Bbab gecA | (3Bdf (3bfd B2 |]  