Here it is, I still don't understand very well, but it seems to be the square wrapped around country of the pac-man guy:
The link to the full article with videos here: https://www.science4all.org/article/flat-torus/
Related stuff: https://blog.demofox.org/2017/10/01/cal ... dal-space/
The hevea torus or where Pacman used to live on...
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