If you like to waste your time in math class but also feel like you should be highly efficient about it, take a lesson from YouTuber Vihart. In five minutes, you too will know the art of squiggling a squiggle inside a squiggle inside a squiggle, also known as the Hilbert space-filling curve. An entire page filled with fractal squiggles! If you get caught maybe you can turn in your Hilbert squiggle for some extra credit. Or draw another in detention.
This image shows Hilbert’s curve construction to the sixth iteration. If you’d like to tinker with the standard model, Fractalus has tutorials for drawing the Hilbert curve with varied center coordinates, enter and exit points, and the somewhat more advanced Hilbert’s Ghost.