Happy Easter! For those who celebrate, Christ is risen!
Here is an egg you may find enjoyable: random curve - Wolfram|Alpha. Unfortunately, not all images have equations, unless you go “Pro” 
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Cropped screenshot
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Nice!
Those are sine based Fourier drawings, aren’t they? As in: everything can be drawn as a series of sine waves.
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Fourier series…https://youtu.be/r6sGWTCMz2k. (Excellent animations).
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Ah… 3Blue1Brown, I should have known they had a video on that. Thanks for pointing it out.