This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Mandelbrot inside iters colour. Mandelbrot set fractal Here it's inside is colourised from special method named palette walk In this example the function uses iterations and palette of colours It starts from palette index Then in every iteration it tests for if true then it decreases the palette index by else it will be incremented