@startuml left to right direction [Center] [Up] [Down] [Left] [Right] ' based on left to right direction ' replaced UDLR with LRDU Center -L-> Up : "is Up" Center -R-> Down : "is Down" Center -D-> Right Center -U-> Left ' if boundary is remove it works rectangle boundary { [InCenter] [InUp] [InDown] [InLeft] [InRight] } ' based on left to right direction ' replaced UDLR with LRDU InCenter -L-> InUp : "should be Up" InCenter -R-> InDown : "should be Down" InCenter -D-> InRight InCenter -U-> InLeft @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