There 2 modes you can choose. Mode 1 always adjusts depending on where your mouse cursor goes. Mode 2 adjusts depending wherever you CLICK.
I just randomly decided to make this. If you decide to use this in a project and want to add shading to it, here is an example of how it can be used. First, input the costumes you want to shade. If you don't want the flashlight, you can remove the sprite and code for it. Then, run the engine. Set the mode to 2. Adjust all 3 number values in the set lighting custom block. Then, you're done!