Compose a piece using the alphabetic notation of the assigned musical structure and the provided melodic motif.
X:1
L:1/8
Q:1/2=100
M:2/2
K:D
['d2 df a2 af', 'Adcd fdcd']  
X:1
L:1/8
Q:1/2=100
M:2/2
K:D
 d2 df a2 af | g2 ge cecA | d2 df a2 af | bgec d2 D2 :: Adcd fdcd | Bgfg ea^ga | Adcd fdcd | 
 Bgec d2 D2 :|  