Compose a piece of music that follows the specified structure and incorporates the given theme.
X:1
L:1/8
M:2/2
K:Bb
['Bbfd cgec BfdB FdBF DBFD EBGE', 'FBdB FBdB', 'FAB=B cAFA FBc^c dBFB'  
X:1
L:1/8
M:2/2
K:Bb
 (3FGA | Bbfd cgec | BfdB FdBF | DBFD EBGE | DEFG ABc^c | Bbfd cgec | BfdB FdBF | DBFD EBGE | 
 D(ec)A B2 :| z2 | FAcA FAcA | FBdB FBdB | GBeB GBeB | FBdB FBdB | FAcA FAcA | FBdB FBdB | 
 c=efe gebe | f(=ef)g f2 || z2 | FAB=B cAFA | FBc^c dBFB | GBcd eBGe | FBc^c dBFd | FAB=B cAFA | 
 FBc^c dBFB | c=efe gebe | f=ege fe_ec ||  