Create a melody and harmony adhering to the specified musical parameters.
'Sectional: Through Composed'  
X:1
L:1/8
M:4/4
K:D
 AG |: FD D/D/D A,D D/D/D | FGAF GEFD | E2 EF GEFD | EDEF GFEG | FD D/D/D A,D D/D/D | FGAF GEFd | 
 cdef geag |1 fdec dBAG :|2 fdec d3 e |: fB B/B/B fa^ge | fB B/B/B afed | c/B/A eA fAeA | 
 c/B/A cd efge | fB B/B/B fa^ge | fB B/B/B afed | cdeg faec |1 d2 dc d3 e :|2 d2 dc d3 A || 
 d/d/d fd d/d/d fd | c/c/c ec c/c/c ec | d/d/d fd d/d/d ef | gfge dcBA | d/d/d fd d/d/d fd | 
 c/c/c ec c/c/c ef | gfge dcBA | cdec dBAG ||  