Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
M:6/8
K:D
['D2 d', 'd2 e f2 f fed e2 e']  
X:1
L:1/8
M:6/8
K:D
 GFE | D2 d BAF | D2 d B2 A | F2 E EFE | F2 E EFE | D2 d BAF | D2 d B2 c | def edc | d2 A :| d2 e | 
 f2 f fed | e2 e edc | d2 d dcB | A3 d2 e | f2 f fed | e2 e edc | def edc | d2 A :|  