Logically Incomplete

Not sure.

[nowheredense]

particles with mass interacting with each other under the force of gravity

Sometimes in a simulation you can do things that can't actually happen irl. Consider a rectangular grid of masses mutually acting under the influence of gravity. They start with nice symmetry, but round off error quickly turns things to chaos. I wrote this in p5js and it's hosted at the free site OpenProcessing.org.

[nowheredense]

Systems Thinking

[nowheredense]

Wrote this “systems-based” animation in p5js.  Testing animated gif posting.

[nowheredense]

Bicycle chain and cassette clock : DIY

I am so going to make one of these.

[curiosamathematica]

Yippee, my first animations in Mathematica!

Let a circle roll around a circle twice as big. The shape traced by a point on the outer circle is a cardioid. Now consider a third circle rolling around the second one as well (again half as big, and at the same speed); its trace is already less familiar. The more circles, the more fractal-ish the resulting curve will be. In the limit, the traced curve can be described with this parametric formula:

(Source of inspiration: http://www.mathrecreation.com/2013/12/brain-curve.html)