Defining an Escher Drawing with Julia (nbviewer.ipython.org)

This is a gem of a post. Loved it.

Don't miss:

   Notice how the fish interlock without leaving out any space in between them.
   Escher FTW.

And:

   Abstraction barriers are useful tools that can reduce the cognitive overhead
   on the programmer.

Although of course familiar with the concepts of abstract data types from CS and architecture/implementation layers from CompE/EE, I've not heard the term abstraction barriers before this. I like the combination.

Note that Compose.jl is used as the backend to the plotting library Gadfly.jl.

http://composejl.org/

Nice article.

By the way, you may want to watch this course by Hal Abelson and Gerald Jay Sussman (Henderson Escher example):

http://ocw.mit.edu/courses/electrical-engineering-and-comput...

Also, the article reminded me of LOGO.