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:D
['G FGA', 'fed e2 d c2 B']  
X:1
L:1/8
M:6/8
K:D
 G | FGA Dcd | c2 B A2 G | FGA DGF | E3 E2 G | FGA Dcd | c2 B A2 G | FGA B2 c | d3- d2 :: e | 
 fed e2 d | c2 B A3 | fed c2 d | e3 e3 | fed e2 d | c2 B A2 B | ABA B2 c | d3- d2 :|  