####tnblog画图 ```mermaid graph LR; 　　A-->B; 　　A-->C; 　　B-->D; ``` ```mermaid sequenceDiagram participant Alice participant Bob Alice->>John: Hello John, how are you? loop Healthcheck John->>John: Fight against hypochondria end Note right of John: Rational thoughts <br/>prevail! John-->>Alice: Great! John->>Bob: How about you? Bob-->>John: Jolly good! ```