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=100
M:2/4
K:G
['GFGA B2B2', '|{f} g4 d4 dcBc']  
X:1
L:1/16
Q:1/4=100
M:2/4
K:G
 z | GFGA B2B2 | GFGA B2B2 | dcBc A2A2 | dcBc A2A2 | GFGA B2B2 | GFGA B2B2 | dcBc A2B2 | G6 :: Bc | 
 dcBc B2B2 |{f} g4 d4 | dcBc A2A2 | dcBc A2A2 | dcBc B2d2 |{f} g4 d4 | dcBc A2B2 | G4 c2 :|  