How do I make this door script E to open while facing the door? [closed]

I've been working at this for a while and haven't come up with a solution. This door script teleport the player to a part and i am trying to make it E to open but only making the GUI pop up while the mouse is facing the door and now i'm back to square one.

I Would really love some help. Thank you in advance

local plr = game.Players.LocalPlayer

local teleports = workspace:WaitForChild("Teleports")
local enterButton = script.Parent.enterButton

local range = 5
local exitPart

enterButton.MouseButton1Click:connect(function()

    if exitPart then

        local hrp = plr.Character:FindFirstChild("HumanoidRootPart")

        if hrp then 

            hrp.CFrame = exitPart.CFrame + Vector3.new(0,3,0)
        end
    end
end)

game:GetService("RunService").RenderStepped:connect(function()

    for _,door in pairs(teleports:GetChildren()) do

        if door.Name:sub(0,4) == "Door" then 

            local exit = teleports:FindFirstChild("Exit"..door.Name:sub(5))

            local hrp = plr.Character:FindFirstChild("HumanoidRootPart")

            if hrp then 

                if (door.Position-hrp.Position).magnitude < range  then

                    if not enterButton.Visible then
                        enterButton.Visible = true

                    end

                else

                    if enterButton.Visible then enterButton.Visible = false end
                    exitPart = exit
                end
            end
        end
    end
end)