Construct a musical work following the provided guidelines and thematic elements.
X:1
L:1/8
M:4/4
K:Bb
['b>f (3d_ef B>d', 'f3 d B3 F (3DEF B,>D'  
X:1
L:1/8
M:4/4
K:Bb
 B/c/d/e/ | (3f^ef b>f (3d_ef B>d | (3F^EF B>F D>FB>d | (3c=Bc e>c A>cF>E | D>FB>d g>Ag>f | 
 (3f=ef b>f (3d_ef B>d | (3F=EF B>F D>FB>d | c>=Bc>e g>Ag>f | (3f=ef (3^fgA (B2 B) :: B/c/d/e/ | 
 f3 d B3 F | (3DEF B,>D F>Bd>=B | c3 B A3 G | F>Ac>e g>Ag>f | f3 d B3 F | (3DEF B,>D F>Bd>B | 
 c>=Bc>e g>Ag>f | (3f=ef (3^fga (b2 b) :|  