# \[ANN\] Fatou.jl : Easily share Julia fractals

**URL:** <https://discourse.julialang.org/t/ann-fatou-jl-easily-share-julia-fractals/12278>\
**Category:** Community\
**Tags:** package, announcement, plotting, fractal\
**Created:** [July 9, 2018, 5:30pm UTC](https://discourse.julialang.org/t/ann-fatou-jl-easily-share-julia-fractals/12278 "2018-07-09T17:30:04Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![chakravala](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/chakravala/32/6832_2.png) [@chakravala](https://discourse.julialang.org/u/chakravala)\
**Post date:** [July 9, 2018, 8:43pm UTC](https://discourse.julialang.org/t/ann-fatou-jl-easily-share-julia-fractals/12278/4 "2018-07-09T20:43:35Z")

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> [@NiclasMattsson](#):
>
> Usually the Mandelbrot set is colored on the outside of the set using the number of iterations required to escape. But I’ve never seen the Mandelbrot set colored on the inside before. What metric are you using to do this?

To answer this question specifically, `Fatou` has essentially two different plotting modes controlled by the `iter` boolean keyword. In the example you referenced, the coloring function e^{-|z|}\cdot n^p is used with the limit values of z, which causes a coloring value that also varies on the inside of the set.

However, if you want to get the traditional iteration count display of the Mandelbrot set, then you need to set the `iter` keyword to `true` as such

```Julia
mandelbrot(:(z^2+c),n=700,N=20,∂=[-1.91,0.51,-1.21,1.21],iter=true,cmap="gist_earth") |> fatou |> plot

```

![mandel](https://global.discourse-cdn.com/julialang/original/3X/b/4/b4b2138b0786cec2387021c08a03d90c3dcd94a7.png)

Then the coloring scheme works as you typically expect it. The title of the plot tells you what kind it is.

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