Debounce Fail Help? FIXED

I'm trying to get a debounce to work on this. I want it so you can only open the gate when the gate is closed and only close it when it is open.

I fixed it:

local trainerRank = 255
local groupId = 2645129

local isOpen = false

function onSpeakDo(message)
    if message:sub(1, 6) == ":open " then
        if not isOpen then
            print("Open")
            if game.Workspace:findFirstChild(message:sub(7)) then
                local Door = game.Workspace:findFirstChild(message:sub(7))

                local Top = Door:findFirstChild("Top")
                Top.PrimaryPart = Top.Main
                local TopStart = Top:GetPrimaryPartCFrame()

                local Bottom = Door:findFirstChild("Bottom")
                Bottom.PrimaryPart = Bottom.Main
                local BottomStart = Bottom:GetPrimaryPartCFrame()

                for i = 1, 100 do
                Top:SetPrimaryPartCFrame(TopStart:lerp(TopStart + Vector3.new(0, Top.Main.Size.Y, 0), i / 100))
                Bottom:SetPrimaryPartCFrame(BottomStart:lerp(BottomStart - Vector3.new(0, Bottom.Main.Size.Y, 0), i / 100))
                wait()
                end

                wait(3)
                isOpen = true
            end
        end
    end

    if message:sub(1, 7) == ":close " then
        if isOpen then
            print("Close")
            if game.Workspace:findFirstChild(message:sub(8)) then
                local Door = game.Workspace:findFirstChild(message:sub(8))

                local Top = Door:findFirstChild("Top")
                Top.PrimaryPart = Top.Main
                local TopStart = Top:GetPrimaryPartCFrame()

                local Bottom = Door:findFirstChild("Bottom")
                Bottom.PrimaryPart = Bottom.Main
                local BottomStart = Bottom:GetPrimaryPartCFrame()

                for i = 1, 100 do
                Top:SetPrimaryPartCFrame(TopStart:lerp(TopStart - Vector3.new(0, Top.Main.Size.Y, 0), i / 100))
                Bottom:SetPrimaryPartCFrame(BottomStart:lerp(BottomStart + Vector3.new(0, Bottom.Main.Size.Y, 0), i / 100))
                wait()
                end

                wait(3)
                isOpen = false
            end
        end
    end
end

game.Players.PlayerAdded:connect(function(newPlayer)
    for key, value in next, game:GetService("GroupService"):GetGroupInfoAsync(groupId).Roles do
        if value.Name:lower() == "champion" then
            trainerRank = value.Rank
        end
    end
    if newPlayer:GetRankInGroup(groupId) >= trainerRank  or newPlayer.Name == "bosswalrus" then
        newPlayer.Chatted:connect(onSpeakDo)
    end
end)