This is a very basic physics simulation that I made to have a cool looking animation on this website’s homepage.
Particles move around bouncing off the edges of the container and each other. When they are close to one another a line connects them. The thickness of the line depends on how close the two particles are to each other. This connects all of the particles in a interesting network pattern that changes over time as the particles move.
All of the movement logic is in javascript and is drawn to the screen using a html <canvas> element.
You can see a demo of it below.