Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
M:4/4
K:A
['A/B/A GB', 'A/B/A GB']  
X:1
L:1/8
M:4/4
K:A
 E | c2 ^Bc EAce | d2 F2 F2 BA | G/A/G FG EGBd | fe ^d/e/f ef=g^g | aecA GAEC | D/E/D CD B,DFA | 
 GBgf edcB |1 A/B/A GB A3 E :|2 A/B/A GB A2 A/G/=G || FAdF EAeE | DEGB A/^A/B ce | df B/c/d ceAc | 
 d2 af gefg | a2 ec Acec | f2 F2 F2 BA | GBgf edcB |1 A/B/A GB A2 A/G/=G :|2 A/B/A GB A3 E ||  