Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/16
M:4/4
K:G
['dBgf edcB cAag fedc', 'FAGB AFED']  
X:1
L:1/16
M:4/4
K:G
 dBgf edcB | cAag fedc | BdBd GBGB | ABcA GFED | dBgf edcB | cAag fedc | BdGB cAGF | G2G2G2 z2 :: 
 FAGB AFED | FAGB AFED | Bdce dBAG | Bdce dBAG | cBcd ecBA | BABc defg | ABcA GFED | G2B2G2 z2 :|  