Timer text not changing?

I am using a hint to show the intermission time or round time In my game. When I join, nothing appears.

Code:

-- Main Game Script for Sword Fighting Arena

local timer = Instance.new("Hint")
local interTime = 30 -- intermission time in seconds
local roundTime = 180
local gameMode = "Intermission"
timer.Parent = game.Workspace

-- Necessary functions
local chosenMap = Instance.new("IntValue")
local newMap = function()
	local map
	local message
	chosenMap.Value = math.random(1) -- range of 1 and the number of maps i.e 1,3
	
	-- Get the map from replicated storage of the chosen map and clone it to workspace
	if chosenMap.Value == 1 then
		-- Generate a message saying the chosen map
		message = Instance.new("Message")
		message.Text = "The chosen map is Classic!"
		message.Parent = game.Workspace
		wait(2)
		message:Destroy()
		
		-- Clone the map to the workspace
		map = game.ReplicatedStorage.Classic:Clone() -- clone to the workspace
		map.Parent = game.Workspace
	end
end

local decrementTimer = function()
	wait(1)
	if gameMode == "Intermission" then
		if interTime < 0 then
			gameMode = "Round"
			interTime = 30
		else
			timer.Text = ("Intermission time: " + tostring(interTime))
			interTime = interTime - 1
		end
		
	elseif gameMode == "Round" then
		if roundTime < 0 then
			gameMode = "Intermission"
			roundTime = 180
		else
			timer.Text = ("Round time: " + tostring(roundTime))
			roundTime = roundTime - 1
		end
	end
end

-- Main game loop
while true do
	wait(1)
	decrementTimer()
end

Thanks in advance.

Consider using a value instead of arithmetic on a string as it won't work, which causes your script, in lines 38 - 56 to not function properly. When using a value, you can also do many more things with the value, such as doing other things with local Gui's or where ever your imagination takes you.