Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/8
M:2/4
K:G
['DG GB A/B/A/G/ ED G2 A G/A/', 'Bd cB AG ED G2 A G/A/']  
X:1
L:1/8
M:2/4
K:G
|: DG GB | A/B/A/G/ ED | G2 A G/A/ | BA A2 | DG GB | A/B/A/G/ ED | G2 A G/A/ | B G G2 :: Bd cB | 
 AG ED | G2 A G/A/ | BA A2 | Bd cB | AG ED | G2 A G/A/ | BG G2 :|  