Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/8
M:4/4
K:Amin
['AGEG AGEG ABcA BGGB ABcd edcB ABcd', 'fg a2 ab aged cBcd efge a2'  
X:1
L:1/8
M:4/4
K:Amin
 AGEG AGEG | ABcA BGGB | ABcd edcB | ABcd efge | a2 af g2 bg | edcB cBcd | ecdB cABG |1 
 EAAG ABcB :|2 E2 A2 A4 || agea agea | agef g2 fg | a2 ab aged | cBcd efge | a2 af g2 bg | 
 edcB cBcd | ecdB cABG |1 E2 A2 A4 :|2 EAAG ABcB ||  