Help with a translating model?

I want a gate (Model) that slides into one position on click and slides back into its original position on second click. almost everything works well except for when i change the ".01" to anything different, it doesn't open nor close anymore.

script.Parent.ClickDetector.MouseClick:connect(function()
	local state = script.Parent.Parent.State
	if state.Value == false then
		state.Value = true
		local Gate = script.Parent.Parent.Gate
		for i = 0, .7, .01 do
			Gate:SetPrimaryPartCFrame(Gate:GetPrimaryPartCFrame() * CFrame.new(0,0,-i))
		end
	else
		state.Value = false
		local Gate = script.Parent.Parent.Gate
		for i = 0, .7, .01 do
			Gate:SetPrimaryPartCFrame(Gate:GetPrimaryPartCFrame() * CFrame.new(0,0,i))
		end
	end			
end)