Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:4/4
K:Amix
['c/d/e dB', 'a e3']  
X:1
L:1/8
M:4/4
K:Amix
|: A2 eA (3Bcd ed | BG G2 dGBG | EA ce a2 ed |1 c/d/e dB BAAG :|2 c/d/e dB BAce || a2 ea a2 ba | 
 g e3 g3 b | a e3 aged | (3Bcd GA B A3 | a e3 agef | g B3 g3 a | b3 a g3 f (3gfe | dged BG A2 ||  