Mermaid Graphing

I made a graph plugin for gatsby that uses mermaid to make quick graphs.

graph LR A-->B B-->C[fa:fa-ban forbidden] B-->D(fa:fa-grav);
sequenceDiagram Alice ->> Bob: Hello Bob, how are you? Bob-->>John: How about you John? Bob--x Alice: I am good thanks! Bob-x John: I am good thanks! Note right of John: Bob thinks a long
long time, so long
that the text does
not fit on a row. Bob-->Alice: Checking with John... Alice->John: Yes... John, how are you?

It works pretty good, if I don't say so myself. On my blog, I'm using the dark theme.