Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/4
M:2/2
K:D
['A d', 'A3/2 G/ F']  
X:1
L:1/4
M:2/2
K:D
 A/B/ | A d A d | A3/2 G/ F A/B/ | A d B e | c2 c e/f/ | e a e a | e3/2 d/ c e | 
 (f/e/)(d/c/) d/c/G/A/ | A3 :| e/f/ | e a e a | e3/2 d/ c e/f/ | e c d e | f2- f f | b ^a b f | 
 b ^a b f | (g/f/)(e/d/) (e/d/)(c/B/) | B2- B B/c/ | d c B A | A3/2 G/ F e/f/ | e d c B | 
 A3/2 G/ F A/B/ | A d A d | A3/2 G/ F A/B/ | A d B e/f/ | d3 :|  