Develop a piece of music by incorporating the provided motif and following the outlined musical structure represented by alphabet characters.
X:1
L:1/8
M:4/4
K:G
['D2 G3 Ac_BAG FE D2 z2 d2']  
X:1
L:1/8
M:4/4
K:G
 D2 | G3 Ac_BAG | FE D2 z2 d2 | d2 c_B c2 B2 | A4 z2 A2 | _B2 BcddcB | c3 _B A2 d2 | G2 GA _B2 A2 | 
 G4 z2 |]  