Door not stopping, why is this happening?

Hi. I am making a game and have tried to make a door but it will not stop opening. It just flies off into the distance. Here is my code:

local doorOpen = false
local Keycards = {
    'Staff Card'
}

script.Parent.Touched:Connect(function(hit)
    for i, v in pairs(Keycards) do
        if hit.Parent.Name == v then
            if doorOpen == false then
                while script.Parent.Parent.Door.Position ~= Vector3.new(2.75, 3.6, -7.5) do
                    script.Parent.Parent.Door.CFrame = CFrame.new(script.Parent.Parent.Door.Position - Vector3.new(0, 0, 0.1))
                    wait(0.01)
                end
            elseif doorOpen == true then
                while script.Parent.Parent.Door.Position ~= Vector3.new(2.75, 3.6, -3) do
                    script.Parent.Parent.Door.CFrame = CFrame.new(script.Parent.Parent.Door.Position + Vector3.new(0, 0, 0.1))
                    wait(0.01)
                end
            end
        end
    end
end)