Alan's Garden: a puzzle game where flowers are tiny programs (opens in new tab)

This is a submission for the What I Built What if you couldn't place a single flower — only teach the garden a rule, and watch it grow itself? That's Alan's Garden. The flowers aren't plants. They're tiny programs. You don't paint the picture; you write the law of nature that paints it for you — then press Sunrise and hold your breath while the bed blooms, cell by cell, into (hopefully) the exact shape you were aiming for. One cell too many and it spills. One too few and there's a gap. Get it...