Develop a musical composition utilizing the presented motif and adhering to the required structure.
X:1
L:1/8
M:3/4
K:F
['ag/a/ ff fg/a/ ba/b/ gg g2 af']  
X:1
L:1/8
M:3/4
K:F
 ag/a/ ff fg/a/ | ba/b/ gg g2 | af bg af | fe/f/ g/f/e/d/ c2 | ag/a/ ff fg/a/ | ba/b/ gg g2 | 
 af bg af | e/f/g/e/ f2 F2 ::  