Each code is made up of two series of flashes.
The first series indicates the 'tens' digit.
The second series indicates the 'ones' digit.
A long pause separates each code.
A shorter pause separates the 'tens' and 'ones'.
Code Format Diagram shows code No. 32.
The first code "flashed out" is always code 12.
If Code 12 repeats at least 4 times in a row there are No Codes in memory.
Codes repeat 3 times each, then the next code repeats 3 times...