Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:3/4
K:D
['FA dc BA GF', 'ec A4 A2 dc df ag ed']  
X:1
L:1/8
M:3/4
K:D
|: FA dc BA | GF (E/F/E/D/) E2 | ef gf ed | dc ec A2 | FA dc BA | GF E2 c2 |1 
 (5:4:5(c/d/c/B/c/) d4 :|2 (5:4:5(c/d/c/B/c/) d3 A ||{/e} dc df ag | ed ef ge | ed dc ec | A4 A2 | 
{/e} dc df ag | ed ef ga | b2 a2 ce | (d/e/d/c/) d4 |]  