Schedule tasks in "pomodoro" calendar in Calendar to get "focus" and "break" notifications.

pomodoro-calendar.applescript

on run {input, parameters}
	tell application "Calendar"
		tell calendar "Pomodoro"
			repeat
				try
					set currentEvents to first event whose start date ≤ (current date) and end date > (current date)
					set currentSummary to currentEvents's summary
					display notification currentSummary with title "Focus on:" sound name "Frog"
					delay 1500
					display notification currentSummary with title "Take a break from:" sound name "Frog"
					delay 300
				on error errMsg
					exit repeat
				end try
			end repeat
		end tell
	end tell
end run