Mine

using System;
using Server;
using Server.Network;
using Server.Mobiles;
using Server.Spells;

namespace Server.Items
{
    public class BluesOnlyTele : Teleporter
    {
        private bool m_RedCheck;

        [CommandProperty(Accesslevel.GameMaster)]
        public bool RedCheck
        {
            get { return m_RedCheck; }
            set { m_RedCheck = value; InvalidateProperties(); }
        }

        [Constructable]
		public BluesOnlyTele() : this( new Point3D( 0, 0, 0 ), null, false )
		{
		}

        [Constructable]
		public BluesOnlyTele() : base( 0x1BC3 )
		{
            m_RedCheck = false;
		}

        public override bool OnMoveOver( Mobile m )
		{
			if ( m_Active )
			{
				if ( !m_Creatures && !m.Player )
					if ( m.Karma >=0 )
					{
						StartTeleport( m );
						return false;
					}
					else
					{
						m.SendMessage("Only Blues May Take Refuge Here!");
						return true;
					}
				}
			}
			return true;
		}

        public BluesOnlyTele(Serial serial)
            : base(serial)
		{
		}
    }    
}