Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
Q:1/8=180
M:6/8
K:D
['A BcB BFA ded dAF', 'gfe fdB']  
X:1
L:1/8
Q:1/8=180
M:6/8
K:D
|: A | BcB BFA | ded dAF | BcA BFF | EFA B2 A | BcB BFA | ded dAF | GBG FAF | EFA d2 :: z | 
 Add d2 d | gfe fdB | gfe fdB | AFA B2 A | dfb a2 a | afd a2 a | gfe fdB | AFA d2 :|  