Compose a piece using the alphabetic notation of the assigned musical structure and the provided melodic motif.
X:1
L:1/16
Q:1/4=90
M:2/4
K:G
['dcBA dcBA', 'D2g2 dcBA']  
X:1
L:1/16
Q:1/4=90
M:2/4
K:G
 dcBA dcBA | G2G2 G4 | gfga g2B2 | AGAB A4 | dcBA dcBA | G2g2 g4 | fgag fed^c | d2d2 d4 :: 
 agfe agfe | d2d2 d4 | c2B2f2a2 | g2B2TB2A2 | D2g2 dcBA | G2g2 g4 | D2g2 dcBA | G2G2 G4 |]  