Compose a music piece that includes the specified motif while adhering to the outlined alphabetical sequence.
X:1
L:1/8
Q:1/2=60
M:2/2
K:G
['B2 G2', 'B2 c2 B2 A2', 'B2 G2']  
X:1
L:1/8
Q:1/2=60
M:2/2
K:G
 g2 d2 B2 G2 | AGAB G4 | AGAB c2 B2 | AGcA B2 G2 | g2 d2 B2 G2 | AGAB G4 | AGAB c2 B2 | AGAB G4 :: 
 B2 c2 B2 A2 | B2 c2 B2 A2 | B2 c2 B2 A2 | GABc d4 :: g2 d2 B2 G2 | AGAB G4 | AGAB c2 B2 | 
 ABcA B2 G2 | g2 d2 B2 G2 | AGAB G4 | AGAB c2 B2 | AGAB G4 :|  