Hi everyone! This is a scroll detector which is used to detect mouse scrolling. It uses a combination of the "When arrow key pressed" and "Arrow key pressed?" blocks to detect when the mouse scrolls up or down to execute code. Test it out by scrolling in this project and seeing how the background reacts! If you want to use this in your own project, simply backpack the code inside or recreate it in your own projects!
While I didn't originally create this way to detect mouse scrolling, it is pretty common and already used in many projects.