It is interesting to look at the reactions in the handful of hours so far:
On the FediVerse, most repliers are posting images of the patterns/messages that they made.
On Reddit, most repliers are merely saying "cool!" and suchlike.
On Hacker News, most repliers are either talking about server load or posting JavaScript that they have written to mass-(un)check all boxes & talking about the rate limiting.
So it looks like it is the Hacker News people who are erasing the FediVerse art.
@eieio
Amusingly, all three groups are perplexed by the coloured boxes.
I am half tempted to start a rumour that clicking the gold or purple boxes also triggers the execution of a hidden piece of the JavaScript. (-:
I wonder how many people are looking at that huge table in the code and trying to discern a mathematical pattern in it.