# Sequence diagram demos

        sequenceDiagram
          accTitle: test the accTitle
          accDescr: Test a description

    			participant Alice
    			participant Bob
    			participant John as John
    Second Line
    			link Alice: Dashboard @ https://dashboard.contoso.com/alice
    			link Alice: Wiki @ https://wiki.contoso.com/alice
    			link John: Dashboard @ https://dashboard.contoso.com/john
    			link John: Wiki @ https://wiki.contoso.com/john
    			autonumber 10 10
    			rect rgb(200, 220, 100)
    			rect rgb(200, 255, 200)

          Alice ->> Bob: Hello Bob, how are you?
          Bob-->>John: How about you John?
          end

          Bob--x Alice: I am good thanks!
          Bob-x John: I am good thanks!
          Note right of John: John thinks a long
    long time, so long
    that the text does
    not fit on a row.

          Bob-->Alice: Checking with John...
          Note over John:wrap: John looks like he's still thinking, so Bob prods him a bit.
          Bob-x John: Hey John - we're still waiting to know
    how you're doing
          Note over John:nowrap: John's trying hard not to break his train of thought.
          Bob-x John:wrap: John! Are you still debating about how you're doing? How long does it take??
          Note over John: After a few more moments, John
    finally snaps out of it.
          end

          autonumber off
          alt either this
          Alice->>+John: Yes
          John-->>-Alice: OK
          else or this
          autonumber
          Alice->>John: No
          else or this will happen
          Alice->John: Maybe
          end
          autonumber 200
          par this happens in parallel
          Alice -->> Bob: Parallel message 1
          and
          Alice -->> John: Parallel message 2
          end

        ---
        title: With forced menus
        config:
          sequence:
            forceMenus: true
        ---
        sequenceDiagram
          participant Alice
          participant John
          link Alice: Dashboard @ https://dashboard.contoso.com/alice
          link Alice: Wiki @ https://wiki.contoso.com/alice
          link John: Dashboard @ https://dashboard.contoso.com/john
          link John: Wiki @ https://wiki.contoso.com/john
          Alice->>John: Hello John, how are you?
          John-->>Alice: Great!
          Alice-)John: See you later!

        sequenceDiagram
          accTitle: Sequence diagram title is here
          accDescr: Hello friends

        participant Alice
        participant Bob
        participant John as John
    Second Line
        rect rgb(200, 220, 100)
        rect rgb(200, 255, 200)
        Alice ->> Bob: Hello Bob, how are you?
        Bob-->>John: How about you John?
        end
        Bob--x Alice: I am good thanks!
        Bob-x John: I am good thanks!
        Note right of John: John thinks a long
    long time, so long
    that the text does
    not fit on a row.
        Bob-->Alice: Checking with John...
        Note over John:wrap: John looks like he's still thinking, so Bob prods him a bit.
        Bob-x John: Hey John - we're still waiting to know
    how you're doing
        Note over John:nowrap: John's trying hard not to break his train of thought.
        Bob-x John:wrap: John! Are you still debating about how you're doing? How long does it take??
        Note over John: After a few more moments, John
    finally snaps out of it.
        end
        alt either this
        Alice->>John: Yes
        else or this
        Alice->>John: No
        else or this will happen
        Alice->John: Maybe
        end
        par this happens in parallel
        Alice -->> Bob: Parallel message 1
        and
        Alice -->> John: Parallel message 2
        end

        sequenceDiagram
        participant 1 as multiline
    using #lt;br#gt;
        participant 2 as multiline
    using #lt;br/#gt;
        participant 3 as multiline
    using #lt;br /#gt;
        participant 4 as multiline
    using #lt;br /#gt;
        1->>2: multiline
    using #lt;br#gt;
        note right of 2: multiline
    using #lt;br#gt;
        2->>3: multiline
    using #lt;br/#gt;
        note right of 3: multiline
    using #lt;br/#gt;
        3->>4: multiline
    using #lt;br /#gt;
        note right of 4: multiline
    using #lt;br /#gt;
        4->>1: multiline
    using #lt;br /#gt;
        note right of 1: multiline
    using #lt;br /#gt;

        sequenceDiagram
        autonumber
        Alice->>John: Hello John,
    how are you?
        autonumber 50 10
        Alice->>John: John,
    can you hear me?
        John-->>Alice: Hi Alice,
    I can hear you!
        autonumber off
        John-->>Alice: I feel great!

            sequenceDiagram
            box lightgreen Alice & John
            participant A
            participant J
            end
            box Another Group very very long description not wrapped
            participant B
            end
            A->>J: Hello John, how are you?
            J->>A: Great!
            A->>B: Hello Bob, how are you ?

          sequenceDiagram
          participant Alice
          participant Bob
          participant John
          par_over Section title
            Alice ->> Bob: Message 1
    Second line
            Bob ->> John: Message 2
          end
          par_over Two line
    section title
            Note over Alice: Alice note
            Note over Bob: Bob note
    Second line
            Note over John: John note
          end
          par_over Mixed section
            Alice ->> Bob: Message 1
            Note left of Bob: Alice/Bob Note
          end

          sequenceDiagram
            actor Alice
            actor John
            Alice-xJohn: Hello John, how are you?
            John--xAlice: Great!

        sequenceDiagram
        participant 1 as $$\frac{\lim_{x\rightarrow0}{\frac{1}{x}}}{\frac{-b\pm\sqrt{b^2-4ac}}{2a}}$$
        participant 2 as $$\beta$$
        participant 3 as $$\delta$$
        participant 4 as $$\frac{\frac{\lim_{x\rightarrow0}{\frac{1}{x}}}{\frac{-b\pm\sqrt{b^2-4ac}}{2a}}}{\frac{\text{d}}{\text{d}x}{x^2}}$$
        1->>2: $$\sqrt{2}$$
        note right of 2: $$\frac{1+\frac{1+\frac{1+\frac{1}{2}}{2}}{2}}{2}+\frac{-b\pm\sqrt{b^2-4ac}}{2a}$$
        2->>3: $$\frac{\lim_{x\rightarrow0}{\frac{1}{x}}}{\frac{-b\pm\sqrt{b^2-4ac}}{2a}}$$
        note right of 3: $$\frac{-b\pm\sqrt{b^2-4ac}}{2a}$$
        3->>4: $$\lim_{x\rightarrow0}{\frac{1}{x}}$$;
        note right of 4: multiline
        4->>1: multiline
    using #lt;br /#gt;
        note right of 1: multiline
    $$\frac{1}{2}$$
    3rd line

          sequenceDiagram
          autonumber
          participant 1 as $$\alpha$$lex
          participant 2 as $$\beta$$ob
          participant 3 as $$\theta$$iffany
          1->>2: Hello John, does  $$\frac{1}{2}+1=2$$?
          loop $$\frac{1}{2}+1=2$$
              2->>2: $$\frac{1}{2}+1=\frac{3}{2}$$
          end
          Note right of 2: $$x = \begin{cases} 1 &\text{if } \frac{1}{2}+1=2 \\ 0 &\text{if } \frac{1}{2}+1\ne2 \end{cases}$$
          2-->>1: $$\frac{1}{2}+1\ne2\implies 1$$
          2->>3: $$\frac{\text{d}}{\text{d}x}{3x^2+2x+1}$$
          3-->>2: $$6x+2$$

        sequenceDiagram
          actor Alice
          actor John
          Alice-xJohn: Hello John, how are you?
          John--xAlice: Great!

        sequenceDiagram
          participant Alice
          participant Bob
          Alice<<->>Bob: Hello!
          Alice<<->>Bob: Wow, we said that at the same time!
          Bob<<-->>Alice: Bidirectional Arrows are so cool