Alice->Bob: Hello Bob, how are you?
Note right of Bob: Bob thinks
Bob-->Alice: I am good thanks!

npm install --save hexo-filter-sequence

sequence:
  # webfont:     # optional, the source url of webfontloader.js
  # snap:        # optional, the source url of snap.svg.js
  # underscore:  # optional, the source url of underscore.js
  # sequence:    # optional, the source url of sequence-diagram.js
  # css: # optional, the url for css, such as hand drawn theme 
  options: 
    theme: 
    css_class: