Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:4/4
K:D
['F>E D>E F3 A d>e e2 d<c', 'D2 (3ABc d2 e3 d (3cAB =c2']  
X:1
L:1/8
M:4/4
K:D
 A>G | F>E D>E F3 A | d>e e2 d<c d>A | F3 G A>F E2 | F3 E D3{EDE} D | D4 D2 AG | F>E D>E F3 A | 
 d>e e2 d<c d>A | F3 G A>F E2 | F3 E D3{EDE} D | D4 D2 || (3ABc | d2 e3 d (3cAB | =c2 d3 e d^c | 
 A2 GE D{EDE}E EA/G/ | FE DE F3 A | d>e e2 d<c d>A | F3 G A>F E2 | F3 E D3{EDE} D | D4 D4 ||  