Parametric pinecone.

Uses principles of Fibonacci spirals, Phi angles and Lucas numbers to create the pinecone shape.

The majority of the mathematical ideas was gleamed from the video below but I highly suggest you watch all 3 videos.

https://www.khanacademy.org/math/recreational-math/vi-hart/spirals-fibonacci/v/doodling-in-math-class-spirals-fibonacci-and-being-a-plant-2-of-3