To protect you from eye strain when watching the screen too long. It forces you to take a break every certain minutes by locking the screen.
You can use the bash script to run the app as:
$ eye
By default, the work time span is 45 minutes, and the break span is 5 minutes.
Or, you can also specify the time span with the command below by yourself:
$ java -jar ./eyekp.jar 45 5
This program is written in Java programming language, and is designed to run on dual monitor settings, should work on single monitor as well.
Have fun!