Construct a music composition that complies with the designated structure and theme.
X:1
L:1/8
Q:1/4=120
M:4/4
K:Bb
['dbfd fecA BdBF dBFD EGFd', 'D(B/c/) dB'  
X:1
L:1/8
Q:1/4=120
M:4/4
K:Bb
 fe | dbfd fecA | BdBF dBFD | EGFd efgf | edcB BAGF | dbfd fecA | BdBF dBFD | EGFd efge | 
 dcBA B2 :: FE | D(B/c/) dB D(B/c/) dB | E(c/d/) ec E(c/d/) ec | Acfb afg=e | f2 f2 f2 f_e | 
 dbfd fecA | BdBF dBFD | EGFd ef/g/ fe | dBcA B2 :|  