Making a door open on Key1Down event and a gui pops up to show (blank key) to open door?

Put this script in the door

local distanceGUIOpens=10 --Change this to the distance between the door and character you want the gui to stay open
game.Players.PlayerAdded:connect(function(plr)
    repeat wait() until plr.Character
    if (plr.Character.Torso.Position-script.Parent.Position).Magnitude<=distanceGUIOpens then
        if not plr.PlayerGui:FindFirstChild("DoorGui") then
            local gui=Instance.new("ScreenGui")
            local textbox=Instance.new("TextBox")
            gui.Parent=plr.PlayerGui
            gui.Name="DoorGui"
            textbox.Name="DoorGui"
            textbox.Text='Press "E" to open door'
            textbox.Parent=gui
            textbox.BackgroundTransparency=1
            textbox.Position=UDim2.new(0.5,0,0.2,0)
            while wait() do
    if (plr.Character.Torso.Positionscript.Parent.Position).Magnitude>=distanceGUIOpens then
                gui:Remove()
            end
        end
    end
end)

This script should work