VHDL Chronometer NEXYS 2 Memorizing Problem

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To make this as short as possible, I have a project at school that requires me to program a Chronometer on the nexys 2 board. The Chronometer must start, pause,reset and record the times that are on the 7 segment display when you press the pause button,and show them all in order when i press a different button from the three mentioned before. I have made it start,pause and reset but i have no clue how to make it memorize the time and then display it. 

 This is my code:  -- Verified 9/3/08 by jht library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL;  entity stopwatch is  Port ( clk : in std_logic;  btns : in std_logic_vector(3 downto 1);  leds : out std_logic_vector(7 downto 5);  an : out std_logic_vector(3 downto 0);  seg : out std_logic_vector(6 downto 0);  dp : out std_logic  ); end stopwatch;  architecture Behavioral of stopwatch is  signal Dhex : std_logic_vector(15 downto 0);  signal Start, Stop, Reset: std_logic := '0';  signal TP_001s: std_logic := '0';  signal run_pulse: std_logic := '0';  signal Blink_on: boolean := FALSE;  signal EN: std_logic_vector(3 downto 0) := "1111"; begin -- Use seven segment display to show elapsed time.  U_SSD: entity HEXSSD port map (hex => Dhex, DP => "0100" , CLK => CLK,  DISP_SEG(7) => dp, DISP_SEG(6 downto 0) => seg , Disp_AN => an,  EN => EN); -- Generate 0.01 sec tick.   U10MS: entity NCNT generic map(500_000) port map (CLK, TP_001s); -- Use DEC_UP_CNT to measure elapsed time.  UDUC: entity DEC_UP_CNT(arch) port map(CLK => CLK, RST => Reset,  EN => Run_Pulse, COUNT => Dhex);  Run_pulse <= TP_001s and START;  ---------------------------------------  -- Remember which button was pressed.  process(clk)  begin  if clk'event and clk = '0' then  if (Reset = '1') and (Start ='1') then  Reset <= '0';  end if;   case btns is  when "100" =>  Start <= '1';  Stop <= '0';  Reset <= '0';  when "010" =>  Start <= '0';  Stop <= '1';  Reset <= '0';  when "001" =>  Reset <= '1';  Stop <= '0';  when others =>  NULL;  end case;  end if;  end process; ---------------------------------------  leds(7) <= Start;  leds(6) <= Stop;  leds(5) <= Reset; --------------------------------------- -- Blink seven segment display -- Add blink when 99.99.  Blink_on <= TRUE when Dhex = X"9999" else FALSE;  process (clk)  variable count: integer range 0 to 25 - 1;  begin  if clk'event and clk = '0' then  if TP_001s = '1' then   count := count + 1 mod 25;  if count = 0 then   if Blink_on then  EN <= not EN;  else  EN <= "1111";  end if;  end if;  end if;   end if;  end process; --------------------------------------- end Behavioral;   Could anyone help? Thanks a lot :)