Open or Close Internet Sharing on Mac

#fw:http://www.macworld.com/article/1157370/applescriptsystempreferences.html 

#AppleScript 
#Filename: ToggleSharing.scpt
tell application "System Preferences"
  activate
end tell

tell application "System Events"
	tell process "System Preferences"
		click menu item "Sharing" of menu "View" of menu bar 1
		delay 2
		tell window "Sharing"
			click checkbox 1 of row 11 of table 1 of scroll area 1 of group 1
			delay 1
			if (exists sheet 1) then
				if (exists button "Turn AirPort On" of sheet 1) then
					click button "Turn AirPort On" of sheet 1
					delay 1
				end if
				click button "Start" of sheet 1
			end if
		end tell
	end tell
end tell

tell application "System Preferences"
  quit
end tell

#bash script
osascript ToggleSharing.scpt