Beginner Q: How do I slow down my counter?

Using clock enables, something like that:

library ieee;

use ieee.std_logic_1164.all;

use ieee.numeric_std.all;

entity counter is

port (clk, reset : in std_logic;

Q : out std_logic_vector(3 downto 0));

end;

architecture dest_cont of dest_led is

signal cont_reg, cont_prox : unsigned(24 downto 0);

signal temp_reg, temp_prox : unsigned(3 downto 0);

signal tick : std_logic;

begin

process(n_clr, clk)

begin

if ( n_clr = '0' ) then

cont_reg <= ( others => '0' );

temp_reg <= ( others => '0' );

elsif( clk'event and clk = '1' ) then

cont_reg <= cont_prox;

temp_reg <= temp_prox;

end if;

end process;

cont_prox <= cont_reg + 1 when ( cont_reg < 25000000 ) else

( others => '0' );

tick <= '1' when ( cont_reg = 25000000 ) else

'0';

temp_prox <= temp_reg + 1 when ( tick = '1' ) else

temp_reg;

q <= std_logic_vector(temp_reg);

end architecture dest_cont;