how do i make it so that when a button is pressed, this variable decreases by one? (Roblox studio, .Lua) - lua

Question

what i want to do is when a button is pressed (in Startergui.ExitGUI.ExitBtn) it decreases a variable value (for me it is "seatsOccupied") by 1. I want to also make it so that if seatsOccupied = 0 then it changes the playercount.text and countdown.text to: playercount.text = "0 / 10" and countdown.text = "Waiting for players.." but i know how to do that.
main script:
seatsOccupied = 0
textLabel = game.Workspace.TruckLanes.InvisibleSurfaceGui.BillboardGui.Frame.TextLabel
playercount = game.Workspace.TruckLanes.InvisibleSurfaceGui.BillboardGui.Frame.Countdown
countdown = 15
signtext = game.Workspace.TruckLanes.Lane2.Sign.Top.SurfaceGui.TextLabel
local TeleportService = game:GetService("TeleportService")
truckSeats = script.Parent.Parent.Truck.Seats:GetChildren() -- define truckSeats here
playercount.Text = "Players: 0 / 10"
script.Parent.Touched:Connect(function(hit)
local player = game.Players:GetPlayerFromCharacter(hit.Parent)
if player then
for i, seat in pairs(truckSeats) do -- use the truckSeats variable here
if not seat.Occupant then
seat:Sit(player.Character.Humanoid)
seatsOccupied = seatsOccupied + 1
playercount.Text = "Players: " .. seatsOccupied .. "/" .. #truckSeats
player.Character.Humanoid.JumpPower = 0
game.ReplicatedStorage.ShowExitGUI:FireClient(player)
for i = 15,0 -1 do
game.Workspace.TruckLanes.InvisibleSurfaceGui.BillboardGui.TextLabel.Text = "Leaving in " ..i.." seconds"
end
for i = 15, 0, -1 do
textLabel.Text = "Leaving in " .. i .. " seconds"
signtext.Text = "Leaving in " .. i .. " seconds"
wait(1)
end
-- Move truck
-- Reserve server
local players = {}
for i, v in pairs(game.Workspace.TruckLanes.Lane2.Truck.Seats:GetChildren()) do
if v.Occupant then
print("Occupant found. " .. v.Parent.Name)
table.insert(players, game.Players:GetPlayerFromCharacter(v.Occupant.Parent))
end
end
if #players > 0 then
for i = 0, 150, 1 do -- Change 30 to number of studs
script.Parent.Parent.Truck:TranslateBy(script.Parent.Parent.Truck.Hitbox.CFrame.lookVector)
wait(0.01)
end
for i = 0, 150, 1 do -- Change 30 to number of studs
script.Parent.Parent.Truck:TranslateBy(-script.Parent.Parent.Truck.Hitbox.CFrame.lookVector)
wait(0.01)
end
local serverData = TeleportService:ReserveServer(12433394609)
TeleportService:TeleportToPrivateServer(12433394609, serverData, players)
for i = 0, 150, 1 do -- Change 30 to number of studs
script.Parent.Parent.Truck:TranslateBy(-script.Parent.Parent.Truck.Hitbox.CFrame.lookVector)
wait(0.01)
end
textLabel.Text = "Waiting For Players.."
playercount.Text = "0 / 10"
end
end
end
end
end)
-- WHERE I DO NOT KNOW WHAT TO DO/WHY ITS NOT WORKING
button = game.StarterGui.ExitGUI.ExitBtn.MouseButton1Click
local function onExitButtonClicked()
if seatsOccupied > 0 then
seatsOccupied = seatsOccupied - 1
playercount.Text = "Players: " .. seatsOccupied .. "/" .. #truckSeats
if seatsOccupied == 0 then
textLabel.Text = "Waiting For Players.."
playercount.Text = "0 / " .. #truckSeats
end
end
end
button:Connect(onExitButtonClicked)
Second script (localscript) that tells the button to do stuff
local clicked = game.ReplicatedStorage.LeaveTruck:FireServer()
-- Connect the function to the ShowExitGUI event
game.ReplicatedStorage.ShowExitGUI.OnClientEvent:Connect(function()
script.Parent.ExitBtn.Visible = true
end)
ExitButtonClicked = function()
print("Exit button clicked")
game.ReplicatedStorage.LeaveTruck:FireServer()
script.Parent.ExitBtn.Visible = false
print("its trueeeeeee")
end
-- Connect the function to the ExitBtn's MouseButton1Click event
script.Parent.ExitBtn.MouseButton1Click:Connect(ExitButtonClicked)
Hierarchy: First script: game -> workspace -> trucklanes -> lane2 -> lane2detector -> detectorscript Second script: game -> starterGui -> exitgui -> ClientExit (Aka the script) the button: game -> startergui -> exitgui -> ExitBtn (aka the button)
I tried the above scripts, but they don't work. I was expecting to: contact with the border seat the player countdown from 15 seconds and a player count -- where it doesn't work when the player presses the leave/exitbtn, it decreases the seatsoccupied value by 1, and when the value is 0, it changes the playercount.text and countdown.text to: "0/10" and "Waiting for players.."