Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
Q:1/2=90
M:2/2
K:C
['d2 FG AFAF', 'dcdB cBcA']  
X:1
L:1/8
Q:1/2=90
M:2/2
K:C
 C |[K:D]"^67" d2 FG AFAF | d2 FG AFAF | BAGF E2 ef | gfed cecA | d2 FG AFAF | d2 FG AFAF | 
 BAGF E2 ef | fdec d4 :: f2 df dfdf | e2 ce cece | f2 df dfaf | edcB A2 Bc | dcdB cBcA | 
 dcdB cBcA | Bfed cBA^G | A2 AA A2 :|  