content: -- TODO: add case 0 => no number displayed
  
  set einer to "left-einer"
  set zehner to "left-zehner"
  
  on increaseZehner()
  	tell application id "com.figure53.QLab.4" to tell front workspace
  		set groupCue to cues of cue (my zehner)
  		
  		set runningIndex to 0
  		repeat with n from 1 to count groupCue
  			if running of groupCue's item n is true then set runningIndex to n
  		end repeat
  		
  		if runningIndex is 10 then
  			-- zehner bereits 9
  			-- setze einer auf 9
  			set groupCueEinser to cues of cue (my einer)
  			start groupCueEinser's item 10
  			repeat with n from 1 to (count groupCueEinser) - 1
  				if running of groupCueEinser's item n is true then stop groupCueEinser's item n
  			end repeat
  		else if runningIndex is not 0 then
  			-- aktuellen stoppen und nächsten zehner starten
  			start groupCue's item (runningIndex + 1)
  			stop groupCue's item runningIndex
  		end if
  	end tell
  end increaseZehner
  
  increaseZehner()
  