diff --git a/README.md b/README.md
index a7116423f02a34dc4fa0e815f3ee98cadb00ca48..f229a8cc29d6634bc8d4d78fcef04ee05cb53bbc 100644
--- a/README.md
+++ b/README.md
@@ -12,14 +12,12 @@ This was designed to process RADseq data from [RESERVEBENEFIT](https://www.biodi
   1. [Prerequisite](#21-prerequisite)
   2. [Data Files](#22-data-files)
   3. [Set up](#23-set-up)
-3. [Reporting bugs](#4-reporting-bugs)
+3. [Reporting bugs](#3-reporting-bugs)
 4. [Running the pipeline](#5-running-the-pipeline)
-  1. [Filter raw data](#51-filter-raw-data)
-  2. [Georeferenced sequences alignments by species](#52-data-files)
-  3. [Species sequence pairwise comparison](#53-species-sequence-pairwise-comparison)
-  4. [Genetic Diversity calculation](#54-genetic-diversity-calculation)
-  5. [Statistical analysis](#55-statistical-analysis)
-
+  1. [Initialisation](#41-initialisation)
+  2. [Configuration](#42-configuration)
+  3. [Run the pipeline into a single command](#43-run-the-pipeline-into-a-single-command)
+  4. [Run the pipeline step by step](#44-run-the-pipeline-step-by-step)
 
 
 # 1. Introduction
@@ -34,64 +32,70 @@ blablabla
 You must install the following softwares and packages :
 
 - [SNAKEMAKE 5.3.0](https://snakemake.readthedocs.io/en/stable/getting_started/installation.html)
-Check version and if the program is correctly installed by typing :
-```
-snakemake --version
-## should give you the output
-5.3.0
-```
+    * Check version and if the program is correctly installed by typing :
+
+    ```
+    snakemake --version
+    ## should give you the output
+    5.3.0
+    ```
 
 - [STACKS 2.0b](http://catchenlab.life.illinois.edu/stacks/)
-Check version and if programs are correctly installed by typing :
-```
-process_radtags --version
-clone_filter --version
-gstacks --version
-populations --version
-## should give you the output
-2.0b
-```
+   * Check version and if programs are correctly installed by typing :
+
+    ```
+    process_radtags --version
+    clone_filter --version
+    gstacks --version
+    populations --version
+    ## should give you the output
+    2.0b
+    ```
 
 - [BWA 0.7.17](https://icb.med.cornell.edu/wiki/index.php/Elementolab/BWA_tutorial)
-Download `bwa` at: http://sourceforge.net/projects/bio-bwa/files/
-```
-tar -xvf bwa-x.x.x.tar.bz2   
-cd bwa-x.x.x
-./configure --prefix=/where/to/install
-make  
-make install
-```
-Check version and if programs are correctly installed by typing :
-```
-bwa
-## should give you the output
-Program: bwa (alignment via Burrows-Wheeler transformation)
-Version: 0.7.17-r1188
-...
-```
-- [SAMTOOLS](http://www.htslib.org/)
-Download `htslib` and `samtools` at : http://www.htslib.org/download/
-Building each desired package from source is very simple:
-```
-cd htslib-1.x
-./configure --prefix=/where/to/install
-make
-make install
-cd ..
-## and similarly for samtools :
-cd samtools-1.x
-./configure --prefix=/where/to/install
-make
-make install
-```
-Check version and if programs are correctly installed by typing :
-```
-samtools --version
-## should give you the output
-samtools 1.9
-Using htslib 1.9
-Copyright (C) 2018 Genome Research Ltd.
-```
+    * Download `bwa` at: http://sourceforge.net/projects/bio-bwa/files/
+
+    ```
+    tar -xvf bwa-x.x.x.tar.bz2   
+    cd bwa-x.x.x
+    ./configure --prefix=/where/to/install
+    make  
+    make install
+    ```
+    * Check version and if programs are correctly installed by typing :
+
+    ```
+    bwa
+    ## should give you the output
+    Program: bwa (alignment via Burrows-Wheeler transformation)
+    Version: 0.7.17-r1188
+    ...
+    ```
+- [SAMTOOLS 1.9 ](http://www.htslib.org/)
+    * Download `htslib` and `samtools` at : http://www.htslib.org/download/
+    * Building each desired package from source is very simple:
+
+    ```
+    cd htslib-1.x
+    ./configure --prefix=/where/to/install
+    make
+    make install
+    cd ..
+    ## and similarly for samtools :
+    cd samtools-1.x
+    ./configure --prefix=/where/to/install
+    make
+    make install
+    ```
+    * Check version and if programs are correctly installed by typing :
+
+    ```
+    samtools --version
+    ## should give you the output
+    samtools 1.9
+    Using htslib 1.9
+    Copyright (C) 2018 Genome Research Ltd.
+    ```
 
 ## 2.2 Data Files
 The included data files are :
@@ -105,24 +109,27 @@ The included data files are :
 
 clone the project and switch to the main folder, it's your working directory
 ```
-git clone dzdzdzworldmap_fish_genetic_diversity.git
+git clone http://gitlab.mbb.univ-montp2.fr/reservebenefit/snakemake_stacks2.git
 cd snakemake_stacks2
 ```
+You will see the following folders :
+
+
 
-# 4. Reporting bugs
+# 3. Reporting bugs
 
 If you're sure you've found a bug — e.g. if one of my programs crashes
 with an obscur error message, or if the resulting file is missing part
 of the original data, then by all means submit a bug report.
 
-I use [GitLab's issue system](https://gitlab.com/reservebenefit/worldmap_fish_genetic_diversity/issues)
+I use [GitLab's issue system](https://gitlab.com/reservebenefit/snakemake_stacks2/issues)
 as my bug database. You can submit your bug reports there. Please be as
 verbose as possible — e.g. include the command line, etc
 
 
 # 4. Running the pipeline
 
-Quickstart
+## 4.1 Initialisation
 
 * open a shell
 * make a folder, name it yourself, I named it workdir
@@ -134,10 +141,27 @@ cd workdir
 * clone the project and switch to the main folder, it's your working directory
 
 ```
-git clone 
+git clone http://gitlab.mbb.univ-montp2.fr/reservebenefit/snakemake_stacks2.git
 cd snakemake_stacks2
 ```
+## 4.2 Configuration
+WORK IN PROGRESS !!!!
+
+## 4.3 Run the pipeline into a single command
+Once you finished [Initialisation](#41-initialisation) and [Configuration](#42-configuration) steps. You can run the whole pipeline simply typing :
+```
+## number of CPU cores available for running the pipeline (for instance here 64 cores)
+N_CORES=64
+## run the pipeline into a single command
+bash main.sh $N_CORES
+```
+
+
+## 4.4 Run the pipeline step by step
 WORK IN PROGRESS !!!!
 
 that's it ! The pipeline is running and crunching your data. Look for the log folder output folder after the pipeline is finished.
 
+
+
+