Hey @avralex,
This could be done using an HTML component or the Custom Component but it’s also possible using the native Tadabase menu.
If you take a look at this template Dadabase - A Social Network for Dads, I’ve done something similar except the menu is not fixed at the bottom of the page. You might be able to easily work around this by placing the menu below the page container in the layout.
I’d love to experiment more with this!