help with script

After reading this forum, I put together this script in which an agent touches a wall and can go through it within 10 seconds.

I used llInstantMessage to avoid spamming the other avatars and llTriggerSoundLimited to try to restrict the sound to the wall area.

I was wondering if there is a way to make the wall becoming transparent ONLY for the agent who touches it and not for all the other avatars around.

Thanks a lot for your help

default 
{ 
touch_start(integer total_number) 
{
   
      llSetStatus( STATUS_PHANTOM, TRUE); 
llSetAlpha( .7, 1);

llSetTimerEvent( 10.0 ); 

llInstantMessage (llDetectedKey(0), "You have 10 seconds to  walk through the wall or you'll be trapped.");

llTriggerSoundLimited("music", 1.0, llGetPos() + <199,154,98>, llGetPos() - <193,146,99>);
}
timer(){
llSetTimerEvent( .0 );
llSetStatus( STATUS_PHANTOM, FALSE); 
llSetAlpha( 1.0, 1 ); 
state default;
} 
} 

no.
that could be done via parcel access list, a lousy approach with negative side effects.

Another way yould be a double door, and the second door only opens if only one agent is between 2 closed doors, because the first door only closes with one agend between both doors.

good idea, thanks!