Produce music using the specified musical structure depicted in letters along with the provided musical theme.
X:1
L:1/8
M:2/4
K:Bb
['dd/g/ f2 BB/c/ B2 f2 fc d>c']  
X:1
L:1/8
M:2/4
K:Bb
 dd/g/ f2 | BB/c/ B2 | f2 fc | d>c B2 | dd/f/BB/c/ | B/c/d/c/ B2 | B>GFG | BG B2 | BG/B<df/ | 
 G/dB/BG | B2 cB | GG F2 | GF/G/FG | BG F2 | G>GFG | BG B2 |]  