Some drifting sync stuff (offsets) in sync w drifting celestial bodies

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Set length for each moon cycle
Or set length between 1 or 2 values
Ie eitherr 7 or 8 

Or set length between 3 values 
Waxing gib 6 7 8 
Crescent 9 10 11 

Etc

Choose a method test through three of each from each phase 

Using seed +1,2,3
And setting cycle

Don’t forget about day of the week choosing randomness value etc.