Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:3/4
K:D
['(uFA) d2 dd dd (dF) Ad fe', 'BA Bd cB A2', 'Bc dc de fd cA eA']  
X:1
L:1/8
M:3/4
K:D
|: (uFA) | d2 dd dd | (dF) Ad fe | dF Ad ba | a2 g2 ed | c2 cc cc | (cE) Ac ed | cA ce ac | 
 d2 z2 ::[K:A] (cd) | (fe ^d)(e fg) | a2 (ce) =dc | BA Bd cB | A2 (ED) (CB,) | A,C EA ce | 
 (ga) (ce) dc | BA Bd cB | A2 z2 ::[K:D] (A^G) | BA ^GA Bc | dc de fd | cA eA cA | dA aA aA | 
 BA ^GA Bc | dc de fd | cA eA aA | d2 z2 :|  