[jonaslanglotz]

It's digital mourning stationery [1] in memory of Tony Hoare [2].

[1] https://en.wikipedia.org/wiki/Mourning_stationery [2] https://news.ycombinator.com/item?id=47324054

[ljf]

Good to see you are un-banned ;) - might have just been that you are a new user.