Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:6/8
K:G
['BAB GDG G2 A Bde', 'GBd g2 g age dBd dBd gbg']  
X:1
L:1/8
M:6/8
K:G
 B2 B BAB | GDG G2 A | Bde dBG | B3 AGA | B2 B BAB | GDG G2 A | Bde dBA | AGF GBd | gdB BAB | 
 GDG G2 A | Bde dBG | B3 AGA | B2 B BAB | GDG G2 A | Bde dBA | AGF GBd || g2 g age | dBd dBd | 
 gbg aga | bge e2 f | gaf gfe | ded def | g2 d edB | ABd efg :|  