VHDL for three traffic light signals

Please check the document. This is the code I was using but it’s not working according to the requirements.

library ieee;
use ieee.std_logic_1164.all;

ENTITY traffic IS
PORT(
    CLK,SW0        : IN BIT;
    LIGHTS         : OUT STD_LOGIC_VECTOR(5 DOWNTO 0));
END traffic;

ARCHITECTURE circuit OF traffic IS
    TYPE STATE_TYPE IS (S0, S1, S2, S3);
    SIGNAL state     : STATE_TYPE;
    SIGNAL count    : integer range 0 to 5;
    CONSTANT SEC5     : integer range 0 to 5 := 5;
    CONSTANT SEC1     : integer range 0 to 5 := 1;
BEGIN
PROCESS (CLK,SW0)
BEGIN
    IF (SW0 = ‘0’) THEN
      IF(CLK’EVENT AND CLK = ‘1’) THEN
        CASE state IS
            WHEN S0 =>
                IF count < SEC5 THEN
                    state <= S0;
                    count <= count + 1;
                ELSE
                    state <= S1;
                    count <=  0;
                END IF;
            WHEN S1 =>
                IF count < SEC1 THEN
                    state <= S1;
                    count <= count +1;
                ELSE
                    state <= S2;
                    count <= 0;
                END IF;
            WHEN S2 =>
                IF count < SEC5 THEN
                    state <= S2;
                    count <= count + 1;
                ELSE
                    state <= S3;
                    count <= 0;
                END IF;
            WHEN S3 =>
                IF count < SEC1 THEN
                    state <= S3;
                    count <= count + 1;
                ELSE
                    state <= S0;
                    count <= 0;
                END IF;
            WHEN others =>
                    state <= S0;
    END CASE;
    END IF;
    END IF;
    END PROCESS;

        C2: PROCESS (state)
        BEGIN
            CASE state IS
                WHEN S0 => LIGHTS <= “001100”;
                WHEN S1 => LIGHTS <= “010100”;
                WHEN S2 => LIGHTS <= “100001”;
                WHEN S3 => LIGHTS <= “100010”;
                WHEN others => LIGHTS <= “001100”;
        END CASE;
        END PROCESS;
END circuit;