Mod5 Counter

I need to do a VHDL program and I need to replace the use of 74191 IC and with the aid of the the FPGA I need use the toogle switches to start the count in mod5. Till now this is the program that I've done can someone guide me what should I do next and another question how do I need to connect the pin from the pin planner.

library ieee;

use ieee.std_logic_1164.all;

entity assignment is

port(

Clock: IN STD_LOGIC;

count : BUFFER STD_LOGIC_VECTOR (3 DOWNTO 0):= x"0000";

I : IN STD_LOGIC_VECTOR (3 DOWNTO 0);

o : BUFFER STD_LOGIC_VECTOR (7 DOWNTO 0) := x"0"

);end ENTITY;

architecture BEH of assignment is --

begin

process (I) --process is sensitive to A and B

variable clk_cnt : integer range 0 to 50000000 :=0;

variable x : integer range 0 to 8 :=0;

begin

if (clock'event and clock = '1') then

clk_cnt := clk_cnt + 1;

if (clk_cnt = 49999999) then

x:= x + 1;

end if;

end if;

if (x = 2) then

O<= "11011010";

end if;

if (x = 3) then

O<= "11110010";

end if;

if (x=4) then

O<= "01100110";

end if;

if (x=5) then

O<= "10110110";

end if;

if (x=6) then

O<= "10111110";

end if;

if (x=8) then

x:=2;

end if;

end process;

end ARCHITECTURE;