Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:2/4
K:G
['D D[GB] [GB]>[GB] [GB] [GB]2 [GB] [GB][GB][G_B][G=B]', '(d2 d)(3c/d/^d/']  
X:1
L:1/8
M:2/4
K:G
 D | D[GB] [GB]>[GB] | [GB] [GB]2 [GB] | [GB][GB][G_B][G=B] | G3 F | [CE] [CE]2 [CE] | 
 [Ge] [Ge]2 [Ge] | cc c/B/A | (F2 F)(F/E/) | D d3 ^c/=c/ | ccBA | (G4 | G3) |: (B/c/) | 
 (d2 d)(3c/d/^d/ | ed AB | c2 cA | F3 (A/B/) | (c2 c)(3B/c/^c/ | dc A_B | =B2 BG | D3 G | 
 (B2 B)(3A/B/c/ | (d2 d)(3c/d/^d/ | eecA | E3 _E | D d3 ^c/=c/ | ccBA | (G4 | G3) :|  