> For the complete documentation index, see [llms.txt](https://todepond.gitbook.io/spacetode/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://todepond.gitbook.io/spacetode/diagrams.md).

# Diagrams

A rule's diagram shows how things are arranged.\
Let's look at a rule more closely:

```
@ => _
_    @
```

**Inputs:**\
The `@` symbol shows where the atom is.\
The `_` symbol checks for an empty space.\
In other words, the rule checks if there is an empty space below the atom.

**Outputs:**\
The `@` symbol shows where to put the atom.\
The `_` symbol shows where to put an empty space.\
In other words, the rule moves the atom down, leaving an empty space behind.