This is simultaneously objectively rubbish and subjectively lovely.
My very first #plottertwitter

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A few days into #plotter fiddling, this is the first thing that has really made me go wow!
(video alt: a pen plotter drawing a really intricate diagram)

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I think I got my plotter to draw a rainbow! #plottertwitter

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The 3-year-old asked for a rainbow heart.

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Omg it draws TeX! #plottertwitter

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Just the number line

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You, a tech startup with millions in angel finance: made an app to turn handwritten maths into TeX.

Me, just the worst kind of smart alec: convinced a pen plotter to turn TeX into handwritten maths