Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:4/4
K:Dmix
['', 'd>ef(d cA)A>c', '', 'G A>BAG A(BcA) G>(AGF) EFGE A>BA(G ABc)d', 'G) A>BAG A(BcA) G>(AGF) EFGE A>BAG AddB']  
X:1
L:1/8
M:4/4
K:Dmix
"^A" |: A | d>ef(d cA)A>c | BGG(A/B/) cAA>c | d>ef(d cA)A>c | BG(AF) D2 D :|"^B" |] G | 
 A>BAG A(BcA) | G>(AGF) EFGE | A>BA(G ABc)d | c(AGE) D2 (D || G) | A>BAG A(BcA) | G>(AGF) EFGE | 
 A>BAG AddB | c(AGE) D2 D |]  