Question about data flow in max

Hi List,

Perhaps you can help me. I have a max patch that constantly looks for the next 1 in a list that indicate on and off beats in a sequencer. The function looks for the next 1 and then it should delete that next occuring 1 in the list.

How do I ensure that I do not keep deleting the next 1 in the list forever?

say, I update the list, how do I tell the “delete next 1″ function that I just updated the list, and it should therefore not delet the next 1 also?

Best,
Kaspar