add the following subrule under “fire walls”:

Each program may design any amount of “consoles” for a specific purpose, which are listed here: destruction, creation, utility, movement. A program cannot do a purpose unless they have a console for that purpose. Each console is represented as a 2-by-2 ascii character block with the same character as the first character of the purpose. At least one of these characters must be adjacent to the starting program. The consoles are defined by their programming, and must be programmed in the same language as the Master Control Program, and compile and run successfully, in order to be used.