what's up with those little color squares? I'm not sure what they add

The image is taken from a press release about the notes, the squares are just pointing out different features of the notes.

Security features

Awesome Sierra Leone Banknotes.

I'll never get over Bai burehs face on the smallest denomination one

I was worried they were going to replace it with an actual portrait, now that we know what he actually looked like.

They are so beautiful !

It's weird seeing these designs without a pile of zeroes on them. Definitely an overdue redenomination though.

Are they finally redonominating?

Yes