Customizing the "Highlight Location" action? (color and location from the mouse)

Questions & Suggestions
1

Is it possible to change somehow the color of the highlighting (and possibly thickness)?

Is it possible to determine the location based on the cursor location?

2

OK I figured this out. I just have to add or subtract from MOUSEX() and MOUSEY(). Works like a charm.

I still can’t figure out how to change the color

3

No, there is no control over the color.

4

Do you know how "Highlight location" works? Is there an applescript function that can produce similar "transparent prompts / overlays"?

5

Highlight Location works by displaying a custom window with mostly transparent area, and drawing in to that.

No, I do not know of any way to do that within AppleScript.

@appleianer mentioned using a floating HTML action in BTT that looks like it does something along those lines at: