//Put this script OnEnter
void main()
{

object oPC = GetEnteringObject();

if (!GetIsPC(oPC)) return;

//Only run once period!
if(GetLocalInt(OBJECT_SELF, "bling")==1)
{
return;
}

object oSelf = OBJECT_SELF;

SetLocalInt(oSelf, "bling", 1);
DelayCommand(0.4, ExecuteScript("bling", oPC));
}