The example code can be slower than your environment because the code is transpiled by babel-standalone in runtime.
You can see the tutorial here.

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$$uml
partition Conductor {
(*) --> "Climbs on Platform"
--> === S1 ===
--> Bows
}

partition Audience #LightSkyBlue {
=== S1 === --> Applauds
}

partition Conductor {
Bows --> === S2 ===
--> WavesArmes
Applauds --> === S2 ===
}

partition Orchestra #CCCCEE {
WavesArmes --> Introduction
--> "Play music"
}
$$


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WYSIWYG

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