diff --git a/readme.txt b/readme.txt
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+++ b/readme.txt
@@ -1 +1,9 @@
-Welcome in Rutherford scattering simulation.
+Welcome in Rutherford scattering simulation. 
+Author: Justyna Ilczuk also known as attero
+License: MIT should be okay ^^
+
+To run simulation you need python 2.7 and pygame - library for python. Both are easy to download and free to use.
+
+If you have those already installed just run "python2 rutherford.py" in command line or whatever you do to run applications on your OS.
+
+Have fun :)