Why are 2 functions not working? Also there's no error at the log

local function zombieSpawn(name)
    local clone = game.ReplicatedStorage.Zombies:FindFirstChild(name):Clone()
    clone.Parent = game.Workspace.Zombies
    clone.HumanoidRootPart.CFrame = CFrame.new(game.Workspace.RandomSpawns:GetChildren()[math.random(1,#game.Workspace.RandomSpawns:GetChildren())].Position)
end
local function forizombie(Times,zombie,cooldown)
    for i=1,Times do
        zombieSpawn(zombie)
        wait(cooldown)
    end
end
local function countdown(theseconds,timed)
    spawn(function()
        for i=timed,0,-1 do
            if #game.Workspace.Zombies:GetChildren() == 0 then
                break
            end
            theseconds = i
            wait(1)
        end
    end)        

end
forizombie(1,"Zombie",2)
local seconds = 90
coundown(seconds,90)