@counter is a built in variable that tracks the current line number of code that a processor is running. In other words, given a program like this:


@counter will start at 1 and print, then it will increment to 2 and printflush, then reset to 1.

The main use of @counter is to create pseudo-functions.

Note that unlike getblock, @counter is 1-indexed.

What's important is that @counter can be read and modified, e.g.


The above will flush 1 to the message.


And the above will skip the second line.

As alluded to in the first section, the main use of @counter is to create functions.

there are two important components to creating functions:

The first is setting the address of your function:
The functions themselves are composed of only 2 lines: a print and a printflush. What's important is the infrastructure - using jumps and operations to set the addresses of the functions.


The second component is a callback, so that you can run multiple functions:
(note that the ends are redundant, but they help to keep the code organized)

That's it!