libraryieee;useieee.std_logic_1164.all;useieee.numeric_std.all;entityvectorisport(led0:outstd_logic);endvector;architecturesynthofvectorissignalv:std_logic_vector(7downto0);beginv<=std_logic_vector'("10101010");led0<=v(1);--- But led0 <= v(0) works okendsynth;