Compose a music piece that includes the specified motif while adhering to the outlined alphabetical sequence.
X:1
L:1/8
M:2/2
K:G
['dB B2', 'G2 BG']  
X:1
L:1/8
M:2/2
K:G
 dB B2 dBGB | dB B2 ABcA | dB B2 dBGB | cABG ABcA :: G2 BG DGBG | G2 BG ABcA | G2 BG DGBG | 
 cABG ABcA :|  