Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
Q:1/8=333
M:6/8
K:Ador
['c2 d', "A2 z aea abc' bag gab aba"]  
X:1
L:1/8
Q:1/8=333
M:6/8
K:Ador
 G | EAB cAd | BGG G2 E | ABA agf | gee e2 f | gba gfe | edB c2 d | ege c2 d | ecA A2 :: z | 
 aea abc' | bag gab | aba agf | gee e2 f | gba gfe | edB c2 d | ege e2 d | ecA A2 :|  