Assemble a musical creation that incorporates the furnished motif and conforms to the predetermined alphabetical structure.
X:1
L:1/8
M:6/8
K:G
['BcB d2 d cBA B2 G GFG', 'A ABA AFd Afd Aaf ge^c dfa', 'cdc aga']  
X:1
L:1/8
M:6/8
K:G
 d | BcB d2 d | cBA B2 G | GFG A2 G | BcB A2 A | BcB d2 d | cBA B2 G | GFG A2 G | FEF G2 :: A | 
 ABA AFd | Afd Aaf | ge^c dfa | agf e2 A | ABA AFd | Afd Aaf | ge^c dfa | ge^c d2 :: B | cdc aga | 
 BcB gfg | cdc aga | Bgf gdB | cdc aga | BcB gfg | cdc aga | dgf g2 :|  