#N pure-nonfiller-LifeHistory.rle
#O Rocknlol, 19 September 2021
#C
#C A "pure nonfiller" is a pattern where
#C - Every cell in the universe is alive in at least one generation;
#C - Every cell in the universe is eventually dead
#C (or, equivalently, alive in only finitely many generations).
#C
#C In other words, it's a 2-state pattern that, run in LifeHistory,
#C results in every cell eventually becoming blue state-2 forever.
#C
#C As of early 2023, this pattern is the pure nonfiller with the
#C smallest known bounding box.
#C
#C Reference:
#C https://conwaylife.com/forums/viewtopic.php?p=135872#p135872
x = 33, y = 27, rule = LifeHistory
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