Well this is it….just don't know the units of time.
[-30]
[-45]
[-60]
[-90]
Is this hours….or days?
Maybe it's 30 hrs with a hold following….then the next is 45 when you come out of the hold….and so on….
The hrs with holds make sense to me….do a count then hold….once conditions met, come out of hold for the next…and repeat for each time.