@neauoire A problem shared by a music teacher turned out to be a 'new' way of drawing cycloids. The screenshot is the result of a cyrcle going trough a 'hole' (inside it) all points moving to (and trough) the hole with the same speed. In your case we'll need 6 points. Here is the hole picture: https://www.youtube.com/watch?v=ZN4OlUDKFB8

@Bristow_69 It is an interesting trap. Since it is white one may suppose that no humans, bu only AI bots would read it. On the other side only human will double click to try select the email address and thus highlight the whole line. I'm planning to apply. Should I talk about cheese or not? And where is that middle of the email? Should I count lines, word, characters or semanic units?

@chrisamaphone This is called 'degoaling' in cartain educational approaches.