Integration Techniques for Physics Simulation

I made this to show three different ways to make a physics simulation:

Blue: Modified Euler Integration (aka Backward Euler Integration);

Green: Euler Integration (aka Forward Euler Integration);

Red: Kinematic Equations;

In this situation, the kinematic equations give the same results as Runge-Kutta integration.

Code: https://editor.p5js.org/simontiger/sketches/Ftv4vZyjm