Induced delay

For a timer of 20 seconds.

I wrote the following code, however the code still gives me the OUTPUT as always high.

The clock used is 50 MHz ( 20 ns ) and therefore I seek to count till 10^9 to obtain 20 seconds.

Below is the code -

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library IEEE;

use IEEE.STD_LOGIC_1164.ALL;

use IEEE.numeric_std.all;

entity timer is

port ( clk : in std_logic ; q : buffer bit );

end entity;

architecture Behavioral of timer is

begin

process(clk)

variable cnt, cnt1: integer range 0 to 10**9 := 0 ;

constant int: integer := (10**6)+1 ;

begin

if rising_edge(clk) then cnt := (cnt + 1)mod int;

if cnt = 10**6 then cnt1 := (cnt1 + 1) mod 1001;

end if;

end if;

if cnt1 = 1000 then q <= '1' ;

end if ;

end process;

end behavioral;

Please help.