It is basically a live update on screen of endlessly repeated circles (or sections thereof) that are drawn and overlaid. The mouse cursor operates as a centre and guide to the automatically generated circle arc; the amplitude slider determines the max deployment angle for the circle arc (min 10 degrees and max 360 for the full circle). Press any key and the output is saved as a tif file. The shape randomness is achieved thanks to the Perlin noise function. At each iteration, the drawn arc either diminishes or grows depending whether its radius has a positive or negative value.