Check out some of this guys stuff on his YouTube channel. It's absolutely amazing! Most of it is 10+ years old. I think maybe when ACAD released ACAD Architecture for basically the same cost as ACAD full the demand for his stuff went down (unfortunately). The life of a LISP programmer, that is, always being the brides maid lol!
I don't think this is being done using GRVECS. To program the font to appear as it does would be nearly impossible (you'd have to draw zero-length lines as individual pixels basically... no f'ing way). The available literature via an online search is telling me that there is no mouse movement reactor included with AutoLISP. It's also not multi-threaded so a timer wouldn't work. I could be wrong but the effort to get this to work with GRVECS would require some AutoLISP voodoo magic. When you look at his other videos, his mouse movements not only draw lines but also affect existing elements too, which further leads me to believe he's using something else. Probably .NET or even C++.
Many of his dialogs are modal and look like DCL dialogs, so he might be combining LISP with other API's.
As far as programming this (or having someone create it for you): If you understand ramps you won't really need it. Similar to what danAllen is saying: It only takes minutes to draw the ramp anyways. Even if someone was kind enough to write the code for you, the time spent writing that code would never even equate to the amount of time saved by a single user over a lifetime. It's impressive code but not worth it unless many users were using it (and I presume that was the creator's plan back in the day).
