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By Joel Hurst.

Lissajous

Stick with whole numbers for best results.

Smokey

Basic smoke without using perlin noise.

Moon craters

Lines conforming to a random start and end around the circumference of a cirlce

Angle

I used to draw these in primary school. Density of lines determined by mouseX, infinitely easier than drawing each line with a ruler.

Fractal tree

Basic fractal tree with 4 branches at equal angles per iteration.

Parametric equations

Made basic here for reliability. Can be a bit unpredictable with random values.

Swirling rectangles

Cool animation I made by mistake.