Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/16
M:2/4
K:Bb
['c2dfdcBG c8 GBcdcBGD F8 G2GBc2d2']  
X:1
L:1/16
M:2/4
K:Bb
 c2dfdcBG | c8 | GBcdcBGD | F8 | G2GBc2d2 | fgfd2<c2B | B2BG B4 | f2>d2cdB2 | GBF2B2>G2 | F8 | 
 F2FGB2GF | D2 F4 G2 | B2c2f2fd | cd B6 | G2 F4 G2 | B2GBc2d2 | cdcB G4 | F2GBGFDC | F8 | 
 c2dfdcBG | c8 | GBcdcBGD | F8 | G2GBc2d2 | fgfd c4 | B2GB B4 | f2>d2cdB2 | GBF2B2>G2 | F8 |]  