Double Pendulum Chaos Light Writing (computer simulation) 4

For a full description please refer to video 1 in this series. In this video the initial conditions are theta1 = theta2 = degrees (i.e. the double pendulum is almost perfectly vertical), and zero initial angular velocity. The light is coloured by the Lagrangian, L = T - V, of the system (see video 2 for a more detailed description of this).