@startuml !pragma teoz true scale 2.0 <STYLE> sequenceDiagram { lifeLine { lineStyle solid } } </STYLE> skinparam { ParticipantFontStyle bold ParticipantBorderColor #4E7DC5 ParticipantBackgroundColor #4E7DC5 ParticipantFontColor white ' shadowing false lifelineStrategy solid ArrowColor black SequenceLifeLineBorderColor black roundcorner 15 } participant a participant b participant c participant d a->b : hello sb->c : send c->d : msg d->a : eee @enduml Submit amiga aws-orange black-knight bluegray blueprint cerulean-outline cerulean crt-amber crt-green cyborg-outline cyborg hacker lightgray mars materia-outline materia metal mimeograph minty plain reddress-darkblue reddress-darkgreen reddress-darkorange reddress-darkred reddress-lightblue reddress-lightgreen reddress-lightorange reddress-lightred sandstone silver sketchy-outline sketchy spacelab spacelab-white superhero-outline superhero toy united vibrant       🎉 Discover the future PlantUML Web Editor! 🚀  PNG  SVG  ASCII Art