Craft a musical work based on the specified structure and given theme.
X:1
L:1/8
Q:1/2=90
M:4/4
K:Bb
['DC B,DFB dFED CEGc eGFE', 'B2 fg afdB Aceg fdcB BAGF ecec'  
X:1
L:1/8
Q:1/2=90
M:4/4
K:Bb
 DC | B,DFB dFED | CEGc eGFE | DB,FD BFdB | A/B/c c2 c2 DC | B,DFB dFED | CEGc eGFE | DFEG Fgfe | 
 d2 B2 B2 :: fg | afdB Aceg | fdcB BAGF | ecec dBdB | AEFE FDEF | GEGB edcB | AFAc fedc | 
 Bbag fedc | B2 B2 B2 :|  