How to reset a timer and make it stop on a "story game"

[TheInfiniteVoids1 (Voide)]

Hello, I am currently making a timer in a story game that allows you to teleport to the game itself along with a queue of 3 players, and I am trying to make the timer stop and reset to the seconds it starts with once there are no players in queue.

Unfortunately, when I exit the queue, and there aren’t any players in queue, the timer keeps on counting down to the negatives and does not stop.

Here is a part of the script that involves the timer:

script.Parent.Part69.Touched:Connect(function(hit)
if hit.Parent:findFirstChild(“Humanoid”) then
if teleporting == false then
local char = hit.Parent
local player = game.Players:FindFirstChild(char.Name)
local inqueue = false

		for i=1,#list do
			if list[i] == char.Name then
				inqueue = true
				
				
			end
		end
		
		if inqueue == false then
			if #list < 3 or #list == 3 then
				table.insert(list,char.Name)
				char.PrimaryPart.CFrame = spawnTeleport.CFrame
				
				updateGui()
				leaveGuiEvent:FireClient(player)
				timer = 15
				for i=1,timer do
					timer = timer - 1
					billboard.Frame.time.Text = timer
					wait(1)

				end
				teleportPlayers()
			end
			
			
			player.CharacterRemoving:connect(function(character)
				removeFromList(character)
			end)
		end
		
	end
end

end)

[TheInfiniteVoids1 (Voide)]

Disregard parts of the script being outside of the box most of the script is in. The script is in order.

[ReloadedO (Reloaded)]

Sounds like this game will be great. To fix this you must follow this. Modify to your likings

local timer = 15 -- Initial timer value
local list = {} -- Queue of players


local function updateGui()
	
end


local function removeFromList(character)
	for i, playerName in ipairs(list) do
		if playerName == character.Name then
			table.remove(list, i)
			updateGui()
			break
		end
	end
end

script.Parent.Part69.Touched:Connect(function(hit)
	if hit.Parent:FindFirstChild("Humanoid") then
		if not teleporting then
			local char = hit.Parent
			local player = game.Players:FindFirstChild(char.Name)
			local inqueue = false

			for i = 1, #list do
				if list[i] == char.Name then
					inqueue = true
				end
			end

			if not inqueue then
				if #list < 3 or #list == 3 then
					table.insert(list, char.Name)
					char.PrimaryPart.CFrame = spawnTeleport.CFrame

					updateGui()
					leaveGuiEvent:FireClient(player)

					
					timer = 15
					while timer > 0 and #list > 0 do
						billboard.Frame.time.Text = timer
						wait(1)
						timer = timer - 1
					end

					
					if #list == 0 then
						timer = 15
					end

					teleportPlayers()
				end

				player.CharacterRemoving:Connect(function(character)
					removeFromList(character)
				end)
			end
		end
	end
end)

[TheInfiniteVoids1 (Voide)]

Thank you so much! This helped me understand the issue of my previous script, and taught me strategies I could use for future scripts!

[ReloadedO (Reloaded)]

Of course, If you have any more problems you can message me on here.