NWScript:

void main()
{
int nGuardCounter = 0;
int nNth = 0;
object oPlayer = GetLastAttacker(OBJECT_SELF);
object oGuard;
//attack basher by the 3 closest NPCs in sight
while (nGuardCounter<3) {
    nNth++;
    oGuard = GetNearestCreature( CREATURE_TYPE_PLAYER_CHAR, PLAYER_CHAR_NOT_PC, OBJECT_SELF, nNth);
    if ( !GetIsObjectValid(oGuard) ) {return;}
    if ( !GetObjectSeen(oPlayer, oGuard) ) {continue;}
    nGuardCounter++;
    AssignCommand( oGuard, ClearAllActions() );
    AssignCommand( oGuard, ActionAttack(oPlayer) );
    }
}