Some 6000 nodes were generated, and if close enough in both time and space, were linked together. There is no pattern here, and none was expected.
A random graph in spacetime looks both random and transient. It might be interesting to know how many of these short paths have branches. For this initial sketch, I did not provide a means of tracking the more complicated graphs.
Link nodes if dt < 0.05 and |dx|+|dy|+|dz| < 0.15