Making a particle simulation in Python Ep3: Adding particle collision.

THIS IS NOT A PYTHON TUTORIAL. This is much more suited for people who already know the basics of Python as I can't be bothered explaining every detail. This is just a showcase of some code that people might want to use. I show a crude particle collision system using the idea of hit boxes. A problem is that if one of the particles is initially stationary it will remain so. I use the Pygame module.