Level rules for nested codeblocks

I am trying to modify the level rules to apply indentation to codeblock elements, which I have allowed for nesting so we can create good code samples.

I have my level rules set up like this, but everything is still flush with the left margin when I am authoring:

Text format rules

If level is: 1

Basic properties

Indents

First indent: 0

Else, if level is: 2

Basic properties

Indents

Move first indent by: +0.5”

Else, if level is: 3

Basic properties

Indents

Move first indent by: +0.10”

Else, if level is: 4

Basic properties

Indents

Move first indent by: +0.15”

Anyone who's done this more often than me have any ideas? I have tried with both a FirstIndent, FirstIndentChange, LeftIndent, and LeftIndent change and whenever I apply the element definitions to my topic it still does not work.