clk_div : process (clk, nrst ) is
begin
	if nrst = ‚äò0‚äô then
		count <= 0;
		vclk <= ‚äò0‚äô;
	else
		if count = 1999 then
			count <= 0;
			vclk <= not vclk;
		else
			count <= count + 1;
		end if;
	end if;
end process;