Martin Krzywinski's Pi Day 2021 forest. Each tree reads digits of π until it hits a 9: every digit splits the canopy by its own branching rule and drops a leaf disc in that digit's color, so the digits stay readable left to right. The 9 ends the tree with a flower — petals colored by the digit before it, center by the next tree's first digit. The first 768 digits end at the Feynman point, 999999: five flowers sitting on the ground. All the wobble comes from a random-number generator built from each tree's own digits. We built this to feel how those rules work from the inside — the math and the vision are entirely Martin's.