Apple Script for pausing/resuming active primary timer on macOS with the Clock app

toggle-timer.scpt

tell application "Clock"
	activate
end tell
tell application "System Events"
	tell application process "Clock"
		tell window 1
			# Go to Timers, 1 = World Clock and so on
			click radio button 4 of radio group 1 of group 1 of toolbar 1
			
			# button 2 is pause, button 1 is cancel
			click button 2 of group 2 of group 1 of group 1 of group 1 of group 1 of group 1 of group 1 of group 1 of group 1 of group 1 of group 1 of group 1 of group 1
			
			click button 1
		end tell
	end tell
end tell