Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
M:6/8
K:G
['', 'BGB cBc dBb d2 g fed cBA', 'f3 efg', 'f2 e']  
X:1
L:1/8
M:6/8
K:G
 d/c/ |: BGB cBc | dBb d2 g | fed cBA | GBe d2 c | BGB cBc | dBb d2 g | fed cBA |1 G3 G2 d/c/ :|2 
 G3 G2 || B/d/ |: g3 f3 | efg d2 c | BAG Bcd | e3 e2 f | a3 g3 | f2 e f2 e |1 dgf e2 d | B3 GBd :|2 
 dfa gba | g3- g3 ||  