How to CFrame pairs without it scrambling?

	for o=1,500 do
	for i,v in pairs(chairs) do
	v.Vector3=v.Vector3.new(0,0.01,0)
	end
	wait()
	end

Basically, since I have different angle bricks, it scrambled EVERYWHERE. throughout Z and X. I don't know how to fix this and I searched everywhere so help would be appreciated!!

@adark

for o=1,500 do
for i,v in pairs(chairs) do
v.CFrame=v.CFrame*CFrame.new(0,0.01,0)
end
wait()
end

Same difference