AppleScriptToggleFullScreenMenuBar.applescript

try
	if application "System Preferences" is running then do shell script "killall 'System Preferences'"
end try

repeat until application "System Preferences" is not running
	delay 0.1
end repeat

tell application "System Preferences"
	reveal pane id "com.apple.preference.dock"
end tell

tell application "System Events" to tell application process "System Preferences"
	repeat while not (exists of UI element "Automatically hide and show the menu bar in full screen" of window "Dock & Menu Bar")
		delay 0.1
	end repeat
	click UI element "Automatically hide and show the menu bar in full screen" of window "Dock & Menu Bar"
	repeat while not (exists of UI element "Automatically hide and show the menu bar in full screen" of window "Dock & Menu Bar")
		delay 0.1
	end repeat
end tell

try
	if application "System Preferences" is running then do shell script "killall 'System Preferences'"
end try