Today, we're going to resurrect a classic drawing toy in After Effects using an expression tied into a few custom sliders. I used Trapcode Particular 2.0 to display the resulting animated patterns but CC Particle World could be used almost as easily and the results can be used in a myriad of ways for your projects. Or you can just experiment and see what kind of unique shapes you can generate just by changing a few numbers.
Every few weeks, we revisit some of our reader's favorite posts from throughout the history of the site. This tutorial was first published in March 2010.