Esempio di codice

modifica
 |                            +-------+
 +-----[ ]--------------------+  A    +----
 | Remote unlock              +-------+
 |                          Remote counter
 |
 |                           +-------+    
 +----[ ]--------------------+  B    +----
 | Interior unlock           +-------+      
 |                       Interior counter 
 |
 |                   +--------+
 +-------------------+ A + B  +-----------
 |                   | into C |
 |                   +--------+
 |                     Adder