Okay, this isn't me, but consider doing this this month:
It is the Advent of Code for 2019
Unfortunately the fediverse is not a supporter or OAth so you will have to use Twitter, Google, Github to login.
@Absinthe Cool, thank you for posting. Hadn't heard of it till now.
From their About page:
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@design_RG click events, I think it has been going on since 2015
@Absinthe Yes, it shows that. Neat!