Craft a musical work based on the specified structure and given theme.
X:1
L:1/8
M:4/4
K:Bb
['d B<B B2{d} A/F<A B<B{d}c>B A<FF>B G<GB>G', 'b>Bf>B (A/B/c) c>B'  
X:1
L:1/8
M:4/4
K:Bb
 d | B<B B2{d} A/F<A | B<B{d}c>B A<FF>B | G<GB>G F<DB,>D | E<E F>E D<B,B, :| B | d>Bf>B b>Bf>B | 
 (A/B/c) c>B A<F F2 | G<GB>G F>DB,<D | E<E{DE} F>E D<B,B,>B | d<Bf>B b>Bf>B | (A/B/c) c>B A<FF>_A | 
 G<EE>G F<DD>F | E<CC>F D<B,B, ||  