local MakeList in
    fun{MakeList M}
        if M == 0 then nil
        else
            {OS.rand}|{MakeList M-1}
        end
    end
    if N == 0 then nil
    else
    local L in
        L = {New List init({MakeList M})}
        L|{Producer M N-1}
    end
    end
end