Continually change variable as an object is moved anywhere in window

With GSAP and the onUpdate functionality of it you can do that.
Here you see a sample.
https://360.articulate.com/review/content/50965c8d-f764-4528-b4a5-a6a4b01a301e/review

Each tick of the animation a variable gets a random number between 1-100. Each second the complete GSAP animation refreshes itself and randomizes all parameters.

Here is the storyline showing how.