Compose music pieces conforming to the prescribed pattern and incorporating the provided musical concept.
X:1
L:1/8
M:2/4
K:A
['agag aecA', 'A z EG BEBE BEcE dEcE BEcE'  
X:1
L:1/8
M:2/4
K:A
|: efg | agag | aecA | agag | aecA | fefg | aecA | B2 dB | A :: z EG | BEBE | BEcE | dEcE | BEcE | 
 cEcE | BEcE | dB GE | A :|  