toggle_dark_mode.applescript

tell application "System Events"
	tell appearance preferences
		set willBeDark to not dark mode
		set dark mode to willBeDark
	end tell
end tell

set terminalTheme to "Tomorrow16"
if willBeDark then
	set terminalTheme to "TomorrowNight16"
end if

tell application "Terminal"
	set current settings of tabs of windows to settings set terminalTheme
end tell