Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
M:4/4
K:D
['F2 FE', 'edcd efge']  
X:1
L:1/8
M:4/4
K:D
 F2 FE DEFD | EA,A,A, EA, A,/A,/A, | F2 FE DEFA | B/c/d ec dBAG | F3 E DEFD | EA,A,A, EA A2 | 
 F2 FE DEFA | cdec d3 e || fd d2 dfaf | edcd efge | fddc dfaf | gfeg fd d/d/d | fddc df a2 | 
 edcd efge | dfaf g2 ag | faeg fd d2 |]  