Added trajectory plot (Figure 5) instructions to README.

README.md

@@ -7,3 +7,7 @@ This repository contains a Python implementation of simulations supporting the p
 A preprint of the paper is available on [ArXiv](https://arxiv.org/abs/2206.01454).
 
 This repository is still under construction, and updated code, as well as instructions for reproducing the results in that paper, will be added soon.
+
+To reproduce Figure 5, run:
+    python trajectory_plot.py
+This should run nearly instantaneously.