Master Slave JK Flip Flop

library ieee;
use ieee.std_logic_1164.all;

entity master_slave_jk is
port(j,k,clk:in std_logic;q1,q1x,z1x:inout std_logic;
q2,q2x,z2x: inout std_logic);
end master_slave_jk;

architecture arc of master_slave_jk is
begin
process(clk)
begin

if clk='1' then

z1x<=(j and (not q2)) or ((not k)and q2);
q1<=z1x after 5 ns;
q1x<=not z1x after 5ns;

else

z2x<=(q1 and (not q2)) or ((not q1x)and q2);
q2<=z2x after 5 ns;
q2x<=not z2x after 5ns;

end if;
end process;
end arc;