[enchancement] changing wallpapers

I decided to leave so much empty space in the background of the introduction part because i wanted the audience to enjoy a great beautiful backgrounds.
It'll be great to implement these backgrounds to be changing randomly on reload.

Add Wallpapers from @shraddhaag's account.

Start by locating the introduction section and the background-image entry point in the portfolio. Review the wallpapers from @shraddhaag's account and determine how the page currently loads its background. Done means a reload selects a wallpaper randomly and the intended backgrounds are included without disrupting the introduction layout.

Written by the indexing model from the issue text.