Blinking light

Can someone show me an easy script to make a light blink?

here is one I use.
Note that it is a 'make believe blinking'
Point light is very annoying when blinking
The script is all free

// Studio Dora Flash Light script, Dora Gustafson d.2008-01-27

float toff_unit = 2.0;
float ton_unit = 1.0;

switch( integer lights_on )
{
    llSetPrimitiveParams( [ PRIM_FULLBRIGHT, ALL_SIDES, lights_on  ] );
}

default
{
    state_entry()
    {
        llSetTimerEvent(toff_unit);
        switch( FALSE );
    }

    timer() { state lightOn; }
}

state lightOn
{
    state_entry()
    {
        llSetTimerEvent(ton_unit);
        switch( TRUE );
    }

    timer() { state default; }
}

Use a dark colored prim and give it some glow, that looks fantastic

this should do the trick, in the timer event TF = !TF simply switches it between true and false for whether the prim should give off light or not. touching it turns it on and off. you may need to adjust the time for the effect you want

integer onoff;
integer TF;
float time = 0.5;//adjust to how fast/slow you want the light to blink

default
{
touch_start()
{
if(onoff){
llSetTimerEvent(time);}
else{llSetTimerEvent(0.0);}
}

timer()
{
llSetPrimitiveParams([PRIM_POINT_LIGHT,TF = !TF, <1, 1, 1>, 1.0, 10.0, 0.75]);
}
}

and as dora said with glow, if you just want the prim to blink and not the actual light it gives off, you can also use a texture anim, i used glow combined with a texture anim to switch between black and white with the alpha at about 0.25 (75 in the edit window) the glow was still there even if the prim wasn't as visible, you could lay that over a wall and give the effect of light flickering on the wall without the lag of switching the light on and off with a timer

Thank you both!!