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* When do I run autotwi.py for morning skyflats?

• autotwi.py is a useful script for taking HPF, LRS2 and VIRUS skyflats. It has a clear and extensive usage mesaage, but some useful extra information is below.

 Start the autotwi script in the  morning when the raw gc2 flux level is around 2.7k adu. 
 Start the autotwi script in the  evening 4min before sunset (if taking HPF flats).
 Start the autotwi script in the  evening after the dome is open and ready for flats with the raw gc2 flux higher than 45K adu (if taking LRS2/ and VIRUS flats).