Update README.md

Author: monkstone

README.md

@@ -1,4 +1,14 @@
 Example-Sketches
 ================
 
-Many of the vanilla processing example sketches have been translated to ruby-processing, and they are mainly written as 'bare' sketches (ie not class wrapped) in keeping with the original processing.  When these sketches the get wrapped in a Sketch class. Should you prefer to write class wrapped sketches these will work equally well with ruby processing. Certain sketch must be run with JRuby-Complete (`load_image` and `shader` sketches), this is some java permissions thing with jruby.
+Many of the vanilla processing example sketches have been translated to ruby-processing, and they are mainly written as 'bare' sketches (ie not class wrapped) in keeping with the original processing.  When these sketches the get wrapped in a Sketch class. Should you prefer to write class wrapped sketches these will work equally well with ruby processing. Certain sketches must be run with JRuby-Complete (`load_image` and `shader` sketches), this is some java permissions thing with jruby.
+
+1. [Basic][]
+
+2. [Topics][]
+
+3. [Libraries][]
+
+[Basic]:https://github.com/ruby-processing/Example-Sketches/tree/master/samples/processing_app/basics
+[Topics]:https://github.com/ruby-processing/Example-Sketches/tree/master/samples/processing_app/topics
+[Libraries]:https://github.com/ruby-processing/Example-Sketches/tree/master/samples/processing_app/libraries