This is a modification from Rustingsword's script to emphasize the most important thing: the actual productivity time. The differences are:

• English display
• Only categorize the activities as Focused and Non-Focused. In the script, I term it as Dispassionated Concentration, because you have to feel dispassionate (or detachment) about your mental monkey in order to stop the procrastination. It is a Buddhism perspective, and related to mindfulness.
• The focused time is large and emboldened.
• Activation switches to NumLock

To-dos:

• Time spent from last idle
• Time spent on non-focused activities from last idle
• Time shift

Apparently today I have spent 4 hours to write this script but only 45 minutes to read textbook. I hope once it's done this chronic situation can be reversed.