Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/4
M:4/4
K:D
['D/>C/D/>E/ F F G G F2 D', 'B2 B c d A2']  
X:1
L:1/4
M:4/4
K:D
 D/>C/D/>E/ F F | G G F2 | D D F A | E E D2 | d/>c/B/>d/ c A | B B A B/>c/ | d3/2 B/ A G | 
 F E D2 :| B2 B c | d A2 A/>_A/ | G B B _B | A4 | B2 B c | d A2 A/>A/ | ^G G E G | A2 A2 | 
 D/>C/D/>E/ F F | G G F2 | D D F A | E E D2 | d/>c/B/>d/ c A | B B A B/>c/ | d3/2 B/ A G | 
 F E D2 |]  