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:C
['D2 C2 z2 G,2']  
X:1
L:1/8
M:4/4
K:C
 G,2 | C2 B,A,G,G,CE | D2 C2 z2 G,2 | C2 B,A, G,2 CE | D2 C2 z2 G,2 | E2 EE E2 EE | GGFE D3 C | 
 B,2 B,2 G3 F | E2 D2 C2 |]  