This is a simple demo that draws a spinny spiral in PICO-8's rainbow colors.
I used the "Approximating log" function described on the PICO-8 wiki, but I added a step where it interpolates between values to achieve some degree of smoothness.
To achieve 30fps operation, every frame, only 1/4 of the screen is drawn, and the bottom half of the screen is always mirrored and flipped from the top half.
P#91356 2021-05-01 15:22
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