My Construction Script stopped working!

So, I was actually developing a personal 2D animation tool. In this case, when moving an object, it would update a variable in real time and I could count on this visual “support”! See the image.

In fact, I just explained the summary of my problem …

Everything was going well, until, suddenly, it stopped working … So sad!

I’m a newbie, so there probably must be better ways to do this …