自由に作って壊そう
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
prevail... John-->>Alice: Great! John->>Bob: How about you? Bob-->>John: Jolly good!
prevail... John-->>Alice: Great! John->>Bob: How about you? Bob-->>John: Jolly good!