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
['B2 B B2', 'g f2']  
X:1
L:1/8
M:6/8
K:G
|: d2 c | B2 B B2 B B2 A GAB | c2 c c2 B c2 d e2 g | f2 f fff | fed c2 A |1 GBd e2 d | B3 :|2 
 G2 d b2 a | g3 |: d2 g | b2 b b2 c b2 a gg/f/e | d3 dd/d/d d2 c B2 g | f2 f f2 g | f2 d cc/B/A |1 
 G2 d e2 ^c | d3 :|2 G2 d cc/B/A | G3 ||  