Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:9/8
K:Dmix
['DED ABc A2 G', 'A2 d dcA f2']  
X:1
L:1/8
M:9/8
K:Dmix
|: DED ABc A2 G | E2 c cAG FGE | DED ABc A2 G | E3 CEA, GFE | DED ABc A2 G | E2 c cAG GAc | 
 d2 A BAG A2 B | cEG AGE D3 :: A2 d dcA f2 d | A2 c cAG e2 c | A2 d dcA f2 g | agf g2 e dcG | 
 A2 d dcA f2 d | A2 c cAG e3 | d2 A BAG A2 B | cEG AGE D3 :|  