Help with zombie spawner

for some reason the code skips over this i put a comment next to the skip. I want to know how to fix this. Thanks :)

while wait(10) do
    local rand = math.random(1,2)
    if game.Workspace.MainGame.ZombieAmount.Value > 0 then
        if rand == 1 then
            if game.Workspace.MainGame.Barrier1.Value == true then
                game.Workspace.MainGame.ZombieAmount.Value = game.Workspace.MainGame.ZombieAmount.Value - 1--SKIPS HERE
                zombie = game.ReplicatedStorage.Zombie:Clone()
                zombie.Parent = game.Workspace.ZombieSpace
                zombie:MakeJoints()
            end
        end
    end
end