Craft a musical work based on the specified structure and given theme.
X:1
L:1/8
M:3/4
K:Bb
['gf ed', 'AB c2 (3agf (3=edc B2 (3bag (3f=ed', 'df cf Bd FB d2 CF Ac'  
X:1
L:1/8
M:3/4
K:Bb
 F2 | B2 d2 f2 | f2 e2 F2 | A2 c2 e2 | e2 d2 B2 | ba gf ed | gf ed cB | Ac eF GA | B4 :: AB | 
 c2 (3agf (3=edc | B2 (3bag (3f=ed | cd =ef ge | fa cf AB | c2 (3agf (3=edc | B2 (3bag (3f=ed | 
 cd =ef ge | f4 :: (3de=e | f2 df cf | Bd FB d2 | CF Ac e2 | df Bd f2 | =ef df cf | Bd FB d2 | 
 CF Ac eA | B4 :|  