EDA流水灯
elsif flag="1001" then light<="00000010"; flag:="1010";
elsif flag="1010" then light<="00001000"; flag:="1011";
elsif flag="1011" then light<="00100000"; flag:="1100";
elsif flag="1100" then light<="10000000"; flag:="1101";
elsif flag="1101" then light<="10101010"; flag:="1110";
elsif flag="1110" then banner<=not banner; flag:="0000";
end if;
end if;
end process;
end behv;