Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:2/4
K:A
['AA/c/ ee/g/ ae{d} cB/A/ dcBA', 'A2 cc/d/ ee ea e2 dB/c/ d/c/B/A/']  
X:1
L:1/8
M:2/4
K:A
 AA/c/ ee/g/ | ae{d} cB/A/ | dcBA | GA B2 | AA/c/ ee/g/ | ae{d} cB/A/ | dcBA | EG A2 :: cc/d/ ee | 
 ea e2 | dB/c/ d/c/B/A/ | G/A/B/G/ E2 | cc/d/ cB | Ag a2 | ed/c/ d/c/B/A/ | EG A2 :|  