Construct a musical piece that contains the provided motif and abides by the prescribed alphabetical scheme.
X:1
L:1/8
M:6/8
K:Dmix
['DED F2 G AdB cAF G3', 'd2 e fed']  
X:1
L:1/8
M:6/8
K:Dmix
|: DED F2 G | AdB cAF | G3 cAG | F3 GEA | DED F2 G | AdB cAF | G3 BAG |1 AFD D2 A, :|2 AFD D2 A |: 
 d2 e fed | f/g/af ge^c | d2 e fed | d^cA d^cA | d2 e fed | f/g/af gfe | d^cA BAG |1 AFD D2 A :|2 
 AFD D2 A, ||  