Could the clock be controlling what letters appear in the sequence? As in, if at 17:00 today a certain sequence shows up, will the same sequence show up at 17:00 tomorrow?
okay i did the math. it always shows 30 letters, 26 letters in the alphabet. so that means that is 30 different choices if they were fixed letters. but since not it is 26 choices in one space. when you do the math you come out to 20,280 different choices