Volume Detect Collision Start Alpha ON/OFF?

id like this to work but im a builder not a scripter , basicly i need the texture to be in the alpha on position until someone shoots the prim then the alpha turns off for 60 secs , i belive in the alpha off position the texture (bullet hole) whould be seen

default
{
state_entry()
{
llVolumeDetect(TRUE); // Starts llVolumeDetect
llListen(0, "", "", "";
}
collision_start(integer total_number)
{
llSay(0, "Detected!"; // Tells you when something penetrates the prim
llSetAlpha(ALL_SIDES,0);
}

listen(integer channel, string name, key id, string message)
{
if( message == "Detected!"
{
llSetAlpha(ALL_SIDES,1);
llSleep(10);
llResetScript();
}
}
}


im sure i have most of this wrong so any help would great

The main problem here is that a prim can't listen to itself.

I.m not inworld to test but try something like

default
{
    state_entry()
    {
        llVolumeDetect(TRUE); // Starts llVolumeDetect
    }
    collision_start(integer total_number)
    {
        llSetAlpha(ALL_SIDES,0);
        llSleep(10);
        llSetAlpha(ALL_SIDES,1);
    }
    
 }

Edit. looking at that you could get problems if its hit more than once, a timer may be better

integer wasHit = FALSE;

default
{
    state_entry()
    {
        llVolumeDetect(TRUE); // Starts llVolumeDetect
    }
    collision_start(integer total_number)
    {
       if(wasHit == FALSE)
       {
        llSetAlpha(ALL_SIDES,0);
       wasHit = TRUE;
       llSetTimerEvent(10.0);
       }
    }
    timer()
    {
         llSetTimerEvent(0.0);
         llSetAlpha(ALL_SIDES,1);
         wasHit = FALSE;
    }
    
 }

This may contain syntax errors.