Produce a musical arrangement that complies with the dictated structure and the suggested theme.
X:1
L:1/8
Q:3/8=120
M:6/8
K:Bb
['B3 F3', 'g2 g gab'  
X:1
L:1/8
Q:3/8=120
M:6/8
K:Bb
 B3 F3 | B3 F3 | Bdf fed | cdB ABc | B3 F3 | B3 F3 | Bdf ecA | B2 d B3 :: f2 f fdB | g2 g gab | 
 fgf fed | cdc cde | f2 f fed | g2 g gab | agf cde | fge"^D.C." dec |]  