སྒོ་བཞིར་དབང་ཆེན་སྡེ་བཞི་ལས་མདོག་ཅན༔
At the four doors are the four Mighty Ones in colours matching their particular activity
Longchen Nyingtik, Dukngal Rangdrol, Avalokiteśvara, Sādhanas, Tibetan Masters, Dilgo Khyentse Rinpoche