Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/8
Q:1/8=300
M:6/8
K:G
['', 'BGG DGG BGB dcB', 'bag aff dff afa agf egg dgg']  
X:1
L:1/8
Q:1/8=300
M:6/8
K:G
 d/c/ |: BGG DGG | BGB dcB | cAA DAA | cAc edc | BGG DGG | BGB dcB | cBc Adc |1 BGG G2 d/c/ :|2 
 BGG G2 g/a/ |: bgg dgg | bgb bag | aff dff | afa agf | egg dgg | cgg Bgg | cBc Adc |1 
 BGG G2 g/a/ :|2 BGG G3 |]  