System Triggers let you run programs or execute commands on your computer when you create a task, complete a task, start a timer, etc. This can be used to interface with other programs or automate your workflow.
First, open your Marvin desktop app, then turn on the System Triggers strategy and open its settings. Here you will find a list of Triggers:
Click on a Trigger to edit the command that will be run when the corresponding action takes place. For example, if you want to play a sound clip when it's time for a break, click the Break Timer Started to expand it:
then type "afplay path_to_sound_file":
As soon as you click outside the box, the trigger is saved, and will be executed as soon as a break timer starts!