Create a melody and harmony adhering to the specified musical parameters.
'Sectional: Through Composed'  
X:1
L:1/8
M:2/2
K:G
 dc |: Bdde dcBG | Bdde dega | beed efga |1 bgaf gfed :|2 bgaf g2 |: (dc) | Bcdc BGGB | 
 BGed BGGB |1 c2 (cd) eAAB | cAeA (cA) :| gfed (3(efg) (af) | gedB G2 |]  