diff --git a/README.md b/README.md
index f0c26d99b1c9f4f029c54bf9c7573d87d1e2a52b..f0032e0f162886fde5db249d6dd35ce11b6c0422 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 
 
-## Getting started
+## Getting started (test run)
 
 - First of all, you have to download the file that contains the particle flux [(here)](https://drive.google.com/file/d/16BHZksUYniZ5w_Vg9jZYT5K5iQEjy4jt/view) and add it to the folder where all the simulation files are.
 
@@ -10,12 +10,22 @@
 - The main file of the simulation is sim.cc.
 
 
-- You have to create a folder (named build, for example). Run 'cmake ..' and then 'make' in the created folder to load and compile all the files.
+- You have to create a folder (named build, for example). Execute 'cmake ..' and then 'make' in this build folder to load and compile all the files.
 
 
 - With the command  ./sim -m input.in  the simulation is run.
 
 
+- A file called data.dat will be created in the folder. This file stores the data of the particles created in the atmosphere and registers it with the format -> ( type of particle , x , y , z , px , py , pz )
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+
+
+
+## If you want edit the code read this
+
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+
 ***
 
 ## Authors and acknowledgment