@startuml
' convert it with additional command line argument -DRELATIVE_INCLUDE="./.." to use locally
!if %variable_exists("RELATIVE_INCLUDE")
  !include %get_variable_value("RELATIVE_INCLUDE")/C4_Dynamic.puml
!else
  !include https://raw.githubusercontent.com/plantuml-stdlib/C4-PlantUML/v2.11.0/C4_Dynamic.puml
!endif

LAYOUT_LANDSCAPE()

Person(admin, "Administrator")
System_Boundary(c1, 'Sample') {
    Container(web_app, "Web Application", "C#, ASP.NET Core 2.1 MVC", "Allows users to compare multiple Twitter timelines")
}
System(twitter, "Twitter")

Rel(admin, web_app, "Uses", "HTTPS")
Rel(web_app, twitter, "Gets tweets from", "HTTPS")

System(S,"S")
System(SU,"S Up")
System(SD,"S Down")
System(SL,"S Left")
System(SR,"S Right")

Rel_Up(S, SU, "Up")
Rel_Down(S, SD, "Down")
Rel_Left(S, SL, "Left")
Rel_Right(S, SR, "Right")

SHOW_LEGEND()
@enduml