Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/4
M:4/4
K:Dmin
['G F/E/ D', 'G F/E/ D']  
X:1
L:1/4
M:4/4
K:Dmin
|: D E/F/ G A | F2 E2 | G F/E/ D G | F/E/ D E2 | D E/F/ G A | F2 E2 | G F/E/ D C | D4 :| d A c G- | 
 G A F2 | G F/E/ D G | F/E/ D E2 | d A c G- | G A F2 | G F/E/ D C | D4 | d A c G- | G A F2 | 
 G F/E/ D G | F/E/ D E2 | D E/F/ G A | F2 E2 | G F/E/ D C | D4 ||  