Rule 090
Single cell
$38.00
GarmentNavy
InkBone
SizeM
Rule90 · 01011010
Initial rowSingle live cell
Lattice161 × 161 cells, periodic
GarmentGildan 64000, 100% ring-spun cotton
PrintDTG front, ~250 dpi, transparent ground
MadeOn demand, printed after you order
Why this rule
Take the XOR of your two neighbours. From a single live cell, that simple instruction draws the Sierpinski triangle without ever being told what a triangle is.