Thank you for stopping here to help, I'm very sorry that I wasn't born to be genial, but I do all that it is in my power to learn from zero to make an app, for me it is a pretty complicated app, for you that are professionals in AI2 it is a piece of cake.
Tim sent me his example here, about two weeks ago. All this time Tim's example was and it is, all the time, on one of my monitors that I have it in front of me.
Tim's example was and continues to be an invaluable source of inspiration for all that I do. What it is not, it is not what I need as an app for my project.
What I need, is that...
And please believe me that in almost every block I was inspired about how and from where by Tim's example, buy his logic, buy his approaches. As I said above, this was a priceless help.
I am very sorry that in about two weeks I learned only so few things in AI2 when I started from knowing nothing. I'm very sorry that I'm not as smart as you expect to be. 
I do all my best to be genial but... Was only two weeks... I'm pretty sure that here, in this community are many others that do more in that time from nothing.
If I ask somebody something, that for me is one hour and a half to give a solution, 99,99999 of the population of the globe even in two lives will not encounter a response. But this... That doesn't mean that all are not all genials.
By the way, I discovered how to make a cell clickable and change the color of the border, now I want to click again and revert the color of the border to the original, if you want/can/have time it is possible to help me with some ideas?!
Thank you for your time.