void main()
{

object oPC = GetEnteringObject();

 if (!GetIsPC(oPC)) return;
 int DoOnce = GetLocalInt(oPC, GetTag(OBJECT_SELF));

if (DoOnce==TRUE) return;

SetLocalInt(oPC, GetTag(OBJECT_SELF), TRUE);

 SendMessageToPC(oPC, "You smell the odour of death....");
}