Hello, world

Start the text editor of your choice and type in the following lines of YAML:

rows:
  - [a]
  - [~, b]
blocks:
  - name: a
    label: Hello
  - name: b
    label: world
connections:
  - start: a
    end: b

Save it as hello.yaml and run:

$ python -m orthogram hello.yaml

This should create a hello.png file in the same directory.