Design a melodic composition using the outlined structure while keeping within the customary elements of the given genre.
'Ternary', 'Sectional: Verse/Chorus/Bridge'  
X:1
L:1/8
Q:1/8=140
M:2/4
K:Dmin
 D |: G2 A2 | d3 c | A>B cA | B2 AD | G2 A2 | d3 c | A>B cA |1 B2 AD :|2 B2 A2 |:[K:G] A>B cA | 
 G>A BG | F>G AF | D2 D2 | A>B cA | Bd BG | A>c AF | G4 :|  