content: # System PreferencesのAccessibilityを開きます。
  tell application "System Preferences"
  	launch
  	reveal anchor "Seeing_ColorFilters" of pane "Accessibility"
  end tell
  
  tell application "System Events"
  	tell application process "System Preferences"
  		delay 1
  		tell window "Accessibility"
  			# 設定画面が出るまで待ちます。
  			repeat until exists checkbox "Enable Color Filters" of tab group 1 of group 1
  				delay 0.01
  			end repeat
  			# グレースケールをon/offします。
  			click first checkbox of tab group 1 of group 1
  		end tell
  	end tell
  end tell
  
  # windowを閉じます。
  tell application "System Preferences" to if it is running then quit
  