Mandelbrot set is a pretext to study rendering, run without screen refresh and scratch performances. The project is driven by slider variables. Rendering may be done by clones or without them; with mirror points or single points. With the variable Colors you may select various rendering styles. When using Clones two other variables are visible: Clones# - says how many clones are activated; Divisor.i - is an index to a list with appropriate divisors (of 360 or 180); with this slider variable you may choose the number of clones desired. In the upper left corner there is a variable reporting the time of the rendering process. Inside the project there are two custom blocks 'clone work' and 'Mandelbrot' that run without a screen refresh, you should experiment to uncheck them and see system performance. You should experiment also with all slider variables. References: https://en.scratch-wiki.info/wiki/Render_Script https://en.scratch-wiki.info/wiki/Recursion_and_Fractals
