Compose music that adheres to the provided musical structure and theme.
X:1
L:1/8
M:2/2
K:Bb
['vB2 BB (dB)BB (ec)fd (gf)ff (ba)gf (ga)bg', 'b2 (vaf)ff (bf)ff (af)ff (bf)ff g2 gg', 'FB (AG)AB'  
X:1
L:1/8
M:2/2
K:Bb
|: vB2 BB (dB)BB | (ec)fd (gf)ff | (ba)gf (ga)bg | fedc B2 b2 :: (vaf)ff (bf)ff | (af)ff (bf)ff | 
 g2 gg (g3 f) | fedc B2 b2 :: vF2 FB (AG)AB | cdec Bd f2 | F2 FB (AG)AB | (cd)ec B2 b2"^Fine." :|  