If we're discussing what a divine being might write the universe in, my vote is not for direct code. Instead, imagine writing something as immense as the universe, you'd want the universe to emerge from simple rules such as basic IFS [1], L-Systems [2], or multi-dimensional cellular automata [3].

There is actually some preliminary research findings giving evidence to cellular automata underpinning the creation of the universe, as part of the Wolfram Physics Project [4].

[1] https://www.stsci.edu/~lbradley/seminar/ifs.html

[2] https://web.cs.wpi.edu/~matt/courses/cs563/talks/cbyrd/pres1...

[3] https://mathworld.wolfram.com/ElementaryCellularAutomaton.ht...

[4] https://www.wolframphysics.org/