@startuml <style> .same { backgroundColor #ff0000/#00ff00 LineThickness 3 stereotype { 'you can set the value to 0 if no stereotype text is needed fontSize 15 } } </style> actor "a1" as ACT1 <<same>> actor "a2" as ACT2 'https://forum.plantuml.net/13635/how-to-define-a-container-with-an-alias-without-a-name actor "<U+0000>" as ACT3 <<same>> actor "a4" as ACT4 node N ACT1 -right-> N ACT2 -down-> N ACT3 -left-> N ACT4 -up-> N @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