Phyllotaxis

Adpated from https://jagi.studio/posts/phyllotaxis/.

In botany, phyllotaxis or phyllotaxy is the arrangement of leaves on a plant stem. Phyllotactic spirals form a distinctive class of patterns in nature.

// adpated from https://jagi.studio/posts/phyllotaxis/
strokeWidth(0.5);
stroke(1, 20, 180, 50);
let numCells = 50;
let numInner = 30;
let numOuter = 100;
let total = numCells + numInner + numOuter;
let outerRadius = 30;
let h = 2;
fill(100, 50, 0, 50);
repeat(i, 50, total, 2) {
	let f = i / (total);
	let a = i * 1.6180339887;
	let distance = f * outerRadius;
	let x = -cos(degrees(a)) * distance;
	let y = sin(degrees(a)) * distance;
	circle(x + 50, y + 50, h);
	h = h + cos(degrees(a)) * 5;
}