You're stationed deep in the mines, where you must collect frontendium minerals using the
:nth-child() pseudo-class. The work starts easy enough, but gets progressively harder as you must select only the mine carts holding the valuable cargo. Reach the end and the riches are yours!
Learn about the CSS pseudo-class selectors
:nth-last-child(). Match patterns using integers, more complex formulas, and combinations of selectors, useful for styling HTML components such as list items and table rows.
Familiarity with the basics of HTML and CSS is helpful for context.