a simple soft to ptotect our eye by notifying user to take a break after wacthing the screen last twenty minutes. You'd better to look a place twenty foots(six meters) or more far away from your position at least for twenty seconds. It is called twenty-twenty-twenty principle.

In this time, I just implement it in Ubuntu 20.04,that is enough for me now. Maybe I will implement a version in Windows in the future. If you are interested in it, join us!