Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
Q:3/8=110
M:6/8
K:A
['c/d/ e>fd c>dB A>GA', 'A2 d fed A2 c ecA']  
X:1
L:1/8
Q:3/8=110
M:6/8
K:A
 c/d/ | e>fd c>dB | A>GA BGE | E>FE E>FE | E>Ac B2 c/d/ | e>fd c>dB | A>GA B>GE | E>FG A>Bc | 
 c>dB A2 :: A | A2 d fed | A2 c ecA | FGA (B/c/d)c | BcA GFE | A2 d fed | A2 c ecA | Fcf efd | 
 c>dB A2 :|  