Show HN: Cyclops a small Mac utility to fullscreen part of the main screen

I created this small utility because I am doing a lot of talks recently and most of them with live coding sessions. The experience is usually terrible, on retina display when mirroring to SXGA, WXGA or even lower, coding is very hard.

So I created this small utility that gives the opportunity to select just a small portion of the main screen that is later available to be fullscreen on a secondary screen.