"the billboard is still stuck on 5 and doesnt count down to 0 but the wall collide works after the teleportation and the teleportation doesnt work after 5 seconds takes much longer and keeps repeating make a walk detector on the mats o it only executes the script once despite players walking on mat"

-- server script 
local ReplicatedStorage = game:GetService("ReplicatedStorage")

local Mat = script.Parent
local PartA = Mat.PartA
local PartB = Mat.PartB

local PlayersOnMat = 0

local BillboardGui = Instance.new("BillboardGui")
local TextLabel = Instance.new("TextLabel")

BillboardGui.Parent = game.Workspace
TextLabel.Parent = BillboardGui

BillboardGui.Adornee = Mat
BillboardGui.Size = UDim2.new(0, 200, 0, 50)
TextLabel.Size = UDim2.new(0, 200, 0, 50)
TextLabel.Text = "5"

local walls = {"wall1", "wall2", "wall3", "wall4", "wall5"}

local function countdown()
	for i = 5, 1, -1 do
		TextLabel.Text = tostring(i)
		wait(1)
	end
	TextLabel.Text = "0"
	wait(1)
	TextLabel.Text = ""
	local players = game.Players:GetPlayers()
	if #players >= 2 then
		players[1].Character.HumanoidRootPart.CFrame = PartA.CFrame * CFrame.Angles(0, math.rad(180), 0)
		players[2].Character.HumanoidRootPart.CFrame = PartB.CFrame
	end
	ReplicatedStorage.Events.MatActivated:Fire()
	for _, wall in pairs(walls) do
		local wallPart = game.Workspace:FindFirstChild(wall)
		if wallPart then
			wallPart.Transparency = 1
			wallPart.CanCollide = false
		end
	end
end

local function onPartTouched(otherPart)
	if otherPart.Parent:FindFirstChild("Humanoid") then
		PlayersOnMat = PlayersOnMat + 1
		if PlayersOnMat == 2 then
			for _, wall in pairs(walls) do
				local wallPart = game.Workspace:FindFirstChild(wall)
				if wallPart then
					wallPart.Transparency = 0
					wallPart.CanCollide = true
				end
			end
			countdown()
			PlayersOnMat = 0 -- reset the count to prevent the script from executing multiple times
			PartA.Touched:Connect(onPartTouched) -- disconnect the Touched event to prevent the script from executing multiple times
			PartB.Touched:Connect(onPartTouched) -- disconnect the Touched event to prevent the script from executing multiple times
		end
	end
end

PartA.Touched:Connect(onPartTouched)
PartB.Touched:Connect(onPartTouched)

PartA.TouchEnded:Connect(function(otherPart)
	if otherPart.Parent:FindFirstChild("Humanoid") then
		PlayersOnMat = PlayersOnMat - 1
		BillboardGui:Destroy()
	end
end)

PartB.TouchEnded:Connect(function(otherPart)
	if otherPart.Parent:FindFirstChild("Humanoid") then
		PlayersOnMat = PlayersOnMat - 1
		BillboardGui:Destroy()
	end
end)