Simple Switch (Auto switch back and forth)

vector color = <1.0, 0.0, 0.0>;

integer switch;

default
{
    state_entry()
    {
        llSetLinkPrimitiveParamsFast(LINK_THIS, [PRIM_FULLBRIGHT, ALL_SIDES, TRUE]);
        llSetTimerEvent(1.0);
    }

    timer()
    {
        if(switch)
            llSetLinkPrimitiveParamsFast(LINK_THIS, [
                                            PRIM_COLOR, ALL_SIDES, color, 1.0,
                                            PRIM_POINT_LIGHT, TRUE, color, 1.0, 0.0, 0.0]);
        else
            llSetLinkPrimitiveParamsFast(LINK_THIS, [
                                            PRIM_COLOR, ALL_SIDES, ZERO_VECTOR, 1.0,
                                            PRIM_POINT_LIGHT, FALSE, ZERO_VECTOR, 1.0, 0.0, 0.0]);
        switch=!switch;
    }
}