This model is an implementation of the Eden ‘tip’ growth process described in

Sawada Y, Ohta S, Yamazaki M and Honjo H 1982 Self-similarity and a phase-transition-like behavior of a random growing structure governed by a nonequilibrium parameter. Physics Review A, 26, 3557-3563.

Click on the image to download and save the model NetLogo file. You will need to install NetLogo including the gradient extension to run this file.