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:1/4=140
M:2/4
K:D
 F/G/ |: AA BB | A2 A2- | A3 F/G/ | AA BB | AA FF | DD EE |1 FF FF- | F3 F/G/ :|2 D2 D2- | D4 |: 
 A>G A3/2 G/ | A/B/A/G/ FD |1 EE F2 | F4 :|2 EE D2 | D4 ||  