Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
M:3/4
K:D
['E4 FE']  
X:1
L:1/8
M:3/4
K:D
 FE | D3 EFA | E4 FE | D2 d2 c2 | B3 BdB | AGFDAF | E4 DE | F3 G F2 | E4 FE | D3 EFA | E4 FE | 
 D2 d2 c2 | B3 BAG | FG A2 F2 | E6 | D6 :|  