create a template html and css

I want to create a template using parts of different websites, and I want them to be replicated exactly multiple times. Therefore:

- 4 pages must be taken
- These 4 pages will be used to create 2 new pages

Requirements:

- Identical input
- Clean HTML, valid according to W3C standards, and well-commented
- Clean CSS
- Clean JavaScript
- Must be mobile-friendly

I will provide the 4 URLs via chat