I used the bitshares logo to build up the letter 'b'.
However, if you look closely, you will see that the letter 'b' is made up of blocks showing the progression of the bitshares logo forming.

I have created a post to explain the design in more detail

Thanks and have a great day! https://steemit.com/art/@apprentice001/my-third-entry-into-the-blocktrades-logo-challenge-by-officialfuzzy