In no way comparable in sophistication, but I did find making an n-body simulation to be unexpectedly profound. My universe started as a uniform random distrib

In no way comparable in sophistication, but I did find making an n-body simulation to be unexpectedly profound. My universe started as a uniform random distribution of small stationary objects, the only rules that existed were gravity (F=gm1m2/r^2) and inertia (F=ma). Mass started clumping together, orbiting each other, eventually forming a relatively stable arrangement of what we recognize as stars orbited by planets orbited by moons. With two simple rules to govern my universe, an emergent order had occurred that mirrored my reality.