global_style.css - use this to implement new style
templates/footer.html - use this if you want to make changes on footer area
templates/nav-bar.html - use this to make changes on navbar area
templates/new_pages.html - use this template as guide to create new pages


js/footer.js - use to import footer to all pages
js/nav-bar.js - use to import nav bar to all pages
js/global.js - use to import all the link and other resources such as js and html in all pages


note: you will other note on the comment section some pages, like home pages(index.html)