Compose a piece using the alphabetic notation of the assigned musical structure and the provided melodic motif.
X:1
L:1/8
M:4/4
K:G
['D2 G2 GG G2 Ac B3 A']  
X:1
L:1/8
M:4/4
K:G
 D2 | G2 GG G2 Ac | B3 A G2 GA | B2 BB B2 ce | d3 c B2 d2 | c2 cB A2 GA | B4 A4 | G4 z2 |]  