Develop a tune that adheres to the given musical structure.
'Sectional: Through Composed'  
X:1
L:1/8
M:6/8
K:D
|: a2 a fef | d3 A3 | Bcd efg | efd cBA | a2 a fef | d3 A3 | Bgf edc | d3 D3 :: F3 GFG | 
 A2 A [AF]3 | c2 d e2 d | g2 f e3 | agf edc | BAG Feg | fed ABc | d3 D3 ::[M:2/2][K:G] Bddg g2 fe | 
 dBAG e2 d2 | Bddg g2 fe | dBAG A2 D2 :: AFAd BGBd | AFAd cBAG | dBd=f eceg | ^fagf g2 G2 :|  