Develop a musical arrangement based on the stated alphabetical form and the given motif.
X:1
L:1/16
M:2/4
K:Bb
['dc c2b2B2 gf eedc BAGF DFBF EGc[BG]', 'B2B2B2 dc Bdce dfeg B2ff cgga baba']  
X:1
L:1/16
M:2/4
K:Bb
 dc | c2b2B2 gf | eedc BAGF | DFBF EGc[BG] | Acdc BAGF | B2b2 B2gf | edcB AGFE | DBDB GecA | 
 B2B2B2 :: dc | Bdce dfeg | B2ff cgga | baba ebge | g2f2 f2ga | baaf dBdf | gfge dB[GF]E | 
 DBFB GecA | B2B2B2 :|  