Assemble a piece of music following the alphabetical representation and incorporating the provided motif.
X:1
L:1/8
M:6/8
K:Amix
['e2 A c2 A', 'AAa aga']  
X:1
L:1/8
M:6/8
K:Amix
 a | e2 A c2 A | ecA AAa | e2 A c2 A | dBG GGa | e2 A c2 A | e2 A c2 A | BGB g2 e | dBG GG :: B | 
 AAa aga | ecA AAc | BBg gfg | dBG GGB | AAa aga | cAe g2 a | gfe g2 a | ecA AA :|  