Compose a piece of music following the given alphabetical representation of the musical structure and the provided motif.
X:1
L:1/8
M:2/2
K:Dmix
['AG FD (3DDD D2 DE FEFA G2', 'c2 Bc']  
X:1
L:1/8
M:2/2
K:Dmix
 AG | FD (3DDD D2 DE | FEFA G2 FG | AGAB cBAG | F2 A,B, C2 AG | FD (3DDD D2 DE | FEFA G2 FG | 
 AGAB cBAG | F2 D2 D2 :: z B | c2 Bc dcBc | d2 cB c2 Bc | d2 cA G2 FG | A2 A,B, C2 AG | 
 FD (3DDD D2 DE | FEFA G2 FG | AGAB cBAG | F2 D2 D2 :|  