sidef-scripts/Math/mandelbrot_set.sf

#!/usr/bin/ruby

func mandelbrot(z) {
    var c = z;
    {   z = (z*z + c);
        z.abs > 2 && return true;
    } * 20;
    return false;
}

for y in (1 `downto` -1 `by` 0.05) {
    for x in (-2 `upto` 0.5 `by` 0.0315) {
        print(mandelbrot(y.i + x) ? ' ' : '#')
    }
    print "\n"
}