in lite-c Workshop 01: Getting to know the engine

function main( )
{
level_load("small.hmp");
ent_create("earth.mdl", vector(10, 20, 30), NULL);
}


it's background always remain blue.

i am trying to change that colour.
i have used this statments:

screen_color.green =150;
screen_color.red =150;
screen_color.blue =150;

also


vec_set(screen_color,vector(200,100,0));

nothing happend.


how to change it??


i have read vec_set() and screen_color from manual.
and
have also seen

typedef struct COLOR
{
var blue,green,red;
} COLOR;

in atypes.h.




why

screen_color.green =100;
and
vec_set(screen_color,vector(200,100,0));

did not work???