Develop a musical piece using the given motif and adhere to the outlined structure.
X:1
L:1/8
M:6/8
K:Dmix
['F2 D G2 E FGA', 'D3 dAd g/f/ed efg e2 d cAc'  
X:1
L:1/8
M:6/8
K:Dmix
|: F2 D G2 E | FGA A2 G | FGA dAd | dcA GFE | F2 D G2 E | FGA d^cd | e=cA GFE | FDD D3 :: 
 dAd g/f/ed | efg e2 d | cAc B^GB | ^cAA A2 G | FED AFD | E=FG A B/c/d | ecA GFE | FDD D3 :|  