#12 for rolling code

It seems like you might be requesting information about a rolling code system, perhaps in the context of security and authentication methods such as remote keyless entry for vehicles or electronic devices. Rolling codes are used to enhance security by changing the code each time a device is used. This method helps prevent replay attacks, where an attacker might intercept and replay the same code to gain unauthorized access. If you're looking for something specific related to rolling codes or if you meant something else by "#12 for rolling code," please provide more context or clarify your question so I can assist you better!