Scrape Multiple Pages

Extend my scraper to collect data from multiple pages (pagination).

Language: [Python, JavaScript, etc.]
Current code: [paste your basic scraper or describe it]

The website has: [pagination like "page 1, 2, 3..." OR "next page" buttons OR infinite scroll]

Requirements:
1. Start from page 1 and collect the data
2. Find the link to the next page
3. Repeat until there are no more pages (or stop after [X] pages)
4. Combine all results into one file
5. Add a small delay between requests (don't overwhelm the server)

Also show me:
- How to detect when I've reached the last page
- How to handle pages that fail to load
- How to save progress so I can resume if interrupted

I'm learning, so explain the pagination patterns and why delays matter.