Stopping a function when goal is met?

Hello! Today I was making code for a minigame I was going to make. I've got the main basics set already, it's just when I want the round to end, I can't stop the function. This makes it continue for 600 seconds when the last person is alive. Any tips? I tried everything before going on the website, I really didn't want to waste any of your guy's time.

local roundLength = 600
local intermissionLength = 10
local InRound = game.ReplicatedStorage.InRound
local GameAreaSpawn = game.Workspace.GameAreaSpawn
local SpawnArea = game.Workspace.SpawnArea
local Status = game.ReplicatedStorage.Status

InRound.Changed:Connect(function()
    if InRound.Value == true then
        for _, player in pairs(game.Players:GetChildren()) do
            local char = player.Character
            char.HumanoidRootPart.CFrame = GameAreaSpawn.CFrame
        end
    else
        for _, player in pairs(game.Players:GetChildren()) do
            local char = player.Character
            char.HumanoidRootPart.CFrame = SpawnArea.CFrame
        end
    end
    end)

local function roundTimer()
    while wait() do
        for i = intermissionLength, 1, -1 do
            InRound.Value = false
            wait(1)
            Status.Value = "Intermission: ".. i .." seconds left"
        end
        for i = roundLength, 1, -1 do
            InRound.Value = true
            wait(1)
            Status.Value = "Game: ".. i .." second left!"

        end
    end
end
spawn(roundTimer)

game:GetService('Players').PlayerAdded:Connect(function(player)
    player.CharacterAdded:Connect(function(character)
        character:WaitForChild("Humanoid").Died:Connect(function()
            if player.Team == game.Teams.PlayersTeam then
                player.Team = game.Teams.ViewersTeam
                local playeramount = game.Teams.PlayersTeam:GetPlayers()
                if #playeramount == 1 then
                    print"You WON!!!!"
                    wait(3)
                    --Right here is where i need the round timer to stop and go back to intermission
            end
        end
        end)
    end)
end)