Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:2/4
K:D
['D2 EF DD C2']  
X:1
L:1/8
M:2/4
K:D
 D2 EF | DD C2 | D2 EF | DD C2 | DD EF | GF ED | CA, B,/B,/C | DD D ||  