Each page has an id in frontmatter:

---
title: How it Works
layout: page
id: howitworks
---
...

I have a _config.yml file:

progressbar:
  index:
    - "firstIndex"
    - "secondIndex"
    - "thirdIndex"
  howitworks:
    - first
    - second
    - third

I want to create an include which loops through progressbar and grabs each item from site.progressbar.{{page.id }}

For example:

<ul>
  {% for thing in site.progressbar.{{ page.id }} %}
    <li>{{ thing }}</li>
  {% endfor %}
</ul>

Is this possible?

ps. I can change anything about the way this is done, including how _config.yml is defined if it makes things easier.

Assuming I’m on page howitworks I should see:

<ul>
  <li>first</li>
  <li>second</li>
  <li>third</li>
</ul>