Produce music using the specified musical structure depicted in letters along with the provided musical theme.
X:1
L:1/8
Q:1/2=60
M:4/4
K:D
['e3 f', 'B2 d2 B>BB>d B2 a2 fefa f2', 'B2 d2 (BABd) ABde (f/a/g/f/) (e/g/f/e/) d>e', 'd2 B>ABd B2 a2 fefa fa (g/f/)(e/d/)']  
X:1
L:1/8
Q:1/2=60
M:4/4
K:D
 d2 | B3 A (AB) (de) | (d/e/f) ed d3 f | e3 f g/f/g/a/ | b2 (ef) e3 f | gfga (g/a/b) a>g | 
 f>e d/e/f/g/{fg} a2 gf | e2 b2 (af)(e>f) | d2 B>d B2 :: d2 | B>BB>d B2 a2 | fefa f2 e>d | 
 (e>d)(e>f) e2 e'2 | (bac'd') b2 ab/d'/ | (BAB)d B2 a>g | f>e (d/e/f/g/){fg} a2 gf | 
 e2 b2 (afe>f) | d2 B>d B2 :: d2 |"^Variation" (BABd) ABde | (f/a/g/f/) (e/g/f/e/) d>e f/e/f/d/ | 
 e2 E>F G/F/G/A/ | BAGF E2 e>f | gG (g/f/g/a/) g/a/b a>g | f>e (d/e/f/g/) (f/g/a) g>f | 
 e2 b2 afe>f | e2 B>d B2 :: d2 | B>ABd B2 a2 | fefa fa (g/f/)(e/d/) | 
 (e>d)(ef) (e/a/b/c'/) (d'/c'/b/a/) | babd' b2 a/b/e' | (BABd) B2 b>g | 
 f>e (d/e/f/g/) (f/g/a) g>f | e2 b2 afe>f | d2 B>d B2 :|  