Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
Q:1/4=120
M:2/2
K:D
['B AFdF AFDB AFde Tc2 EF/G/ AFdF', 'df/g/ af']  
X:1
L:1/8
Q:1/4=120
M:2/2
K:D
 B | AFdF AFDB | AFde Tc2 EF/G/ | AFdF AFDf | e>def d/d/dd :| f | df/g/ af bgag | Tf>edf e/e/e e2 | 
 df/g/ af bgaf | e>def d/d/d d2 | df/g/ af bgag | Tf>edf e/e/e e2 | dfeg fagf | e>def d/d/dd |]  