Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
Q:1/4=200
M:3/2
K:Bb
['d2 (dc)']  
X:1
L:1/8
Q:1/4=200
M:3/2
K:Bb
 F2 | (GF) (GA) B6 A2 | (GF) G2 D6 A2 | B2 c2 d6 G2 | (FG) A2 B6 (Bc) | d2 (dc) (B2 c4) d2 | 
 (dc) B2 A6 (BA) | (GF) (DE) F6 d2 | (cB) G2 G4 |]  