switch macOS dark mode to prevent iMac image retention

switch-darkmode.sh

#!/usr/bin/env bash

# 1. what is image retentiion: https://support.apple.com/en-us/HT202580
# 2. Put this file ~/.local/bin/
# 3. then Add this to crontab
#    */10 * * * * ~/.local/bin/switch-darkmode.sh

osascript -e '
tell application id "com.apple.systemevents"
	tell appearance preferences
		if dark mode is true then
			set dark mode to false
                else
			set dark mode to true
		end if
	end tell
end tell
'