countdown:
            begin
            sel_next = 3'b001;
                if (count_next == 0)
                    begin
                        state_next = timer;
                    end
                else
                    begin
                        count_next = count + 1;
                        if(count_next == 0)
                            begin
                                state_next = timer;
                            end
                    end
            end