Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/8
M:6/8
K:G
['FGA e2 d', 'fdd gdd afd d2 c', 'gfe def']  
X:1
L:1/8
M:6/8
K:G
|: Bc | dcd f2 g | dcd B2 G | FGA e2 d | FGA e2 d | dcd f2 g | dcd B2 G | FGA e2 d | G2 G2 :: d2 | 
 fdd gdd | afd d2 c | Bdg gfg | ^gaa =g2 d | fdd gdd | afd d2 c | dfg gec | e2 d/c/ B/c/ :: B2 | 
 eBB fBB | gfe def | eba gfe | def Bcd | eBB fBB | gfe def | eba gfg | eBc z :|  