Our M‑x xx command is just about complete. As a final touch, we’ll expand it to read the colours within a pattern as input.

It currently uses a fixed list of colours — (black magenta pink).

This list was easy to work with, but won’t apply to any other patterns but bakery.xx.

As a final touch, we’ll expand M‑x xx to read in the colours as input. To do this, we’ll need to build and explore dynamic lists.

This is the last stretch of our journey of Elisp. If you’ve been able to follow the challenges of quote and lambda you’ll find it a comfortable stroll.

Off we go!

Learning objectives

• Access pair and list elements with car and cdr

• Build lists dynamically with cons

• Define pairs and lists

• Construct static pairs using the dot syntax