ChunkyPNG:
- Top level docs https://www.rubydoc.info/gems/chunky_png/ChunkyPNG
- Colours https://rdoc.info/gems/chunky_png/1.2.0/ChunkyPNG/Color
ruby binary_tree_demo.rb # run the binary tree demo
ruby sidewinder_demo.rb # run the sidewider demo
rdebug-ide binary_tree_demo.rb # run the debugger