The answer is traffic flow.
An ordinary hindering traffic law says: No individual should drive upon an interstate at such an ease back speed as to obstruct or hinder the typical and sensible development of the movement, aside from when decreased speed is essential for a safe task, on account of a review, or consistence with the law.
Answer: An algorithm
Explanation: Computer programs are algorithms. They are finite set of rules or instructions carefully written to perform a specific task. The algorithm is written in a flexible manner without the moves being 'hard-coded', This allows the program to adjust and routinely calculate all possible game moves.
Hard coding the moves reduces the flexibility of the algorithm. Hard coding is used when there is something we want to embed within our program permanently without being changed.
The algorithm only states the rules of the game, without the limiting the moves a player can make.
Ghostbusters and Gremlins are to me the 2 movies that do not depend on CGI but depend on handmade and hand done special effects