Make excel able to calculate the data by using highlighted cells.

[Chango99]

I'm trying to make an excel to keep track of my time spent on things. I am trying to spend more time being productive so i'm hoping this will help me realize how much time I am spending being unproductive so I can change that habit. Ironically, I've wasted a few hours being "unproductive" making this excel.

Anyway, the attachment is what I made. It's not at all complicated, it was just me messing around. Any suggestions on how to improve it somehow? It has no formulas or inputs that will change anything, which is what I want to do. I have basically no idea how to work excel though. What I want, if it's even possible, is excel to calculate the total hours of productivity, unproductivity, and neutral at the end of each day by calculating each specifically highlighted cell, each cell being 30 minutes, and making it show at the end.

A bit hard to plain, take a look at the excel and you will understand. It probably looks dumb and over simplistic to veteran excel users.