Craft a musical work adhering to the specified theme and structure.
X:1
L:1/8
M:3/4
K:Bb
['BF DF BF d4 B2', '(3(Bcd) e2'  
X:1
L:1/8
M:3/4
K:Bb
|: F2 | BF DF BF | d4 B2 | (Ac) (ce) e2 | (Bd) (df) f2 | BF DF BF | d4 B2 | Ac ce Ac | B2 z2 :: 
[K:Eb] (3(Bcd) | e2 G2 B2 | e4 (3(GBe) | g2 e2 g2 | b4 (3(Bcd) | e2 d2 c2 | B3 c B2 | A2 F2 B2 | 
 E2 z2 :|  