Create a musical piece using the provided alphabetic structure and motif.
X:1
L:1/8
M:2/4
K:G
['BD GB BA/B/ c2 AD FA', 'G2 d2 g2 b3 a gfed cB']  
X:1
L:1/8
M:2/4
K:G
 BD GB | BA/B/ c2 | AD FA | (.G.B) d2 | BD GB | BA/B/ c2 | AD FA | G2 G2 :: d2 g2 | b3 a | gfed | 
 cB cB | c2 g2 | a3 g | fd ef | g2 z2 :|  